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BaseRepresentation
bin100100011010110…
…0011111001100111
310011011102001011211
41020311203321213
510000313001411
6321131412251
742165554614
oct11065437147
93134361154
101222000231
11577872951
122a12b4087
1316622817a
14b841950b
1572434221
hex48d63e67

1222000231 has 4 divisors (see below), whose sum is σ = 1264138200. Its totient is φ = 1179862264.

The previous prime is 1222000229. The next prime is 1222000261. The reversal of 1222000231 is 1320002221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1320002221 = 5922372919.

It is a cyclic number.

It is not a de Polignac number, because 1222000231 - 21 = 1222000229 is a prime.

It is a super-2 number, since 2×12220002312 = 2986569129128106722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222000201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21068941 + ... + 21068998.

It is an arithmetic number, because the mean of its divisors is an integer number (316034550).

Almost surely, 21222000231 is an apocalyptic number.

1222000231 is a deficient number, since it is larger than the sum of its proper divisors (42137969).

1222000231 is an equidigital number, since it uses as much as digits as its factorization.

1222000231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42137968.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1222000231 is about 34957.1198899452. The cubic root of 1222000231 is about 1069.1133747641.

Adding to 1222000231 its reverse (1320002221), we get a palindrome (2542002452).

The spelling of 1222000231 in words is "one billion, two hundred twenty-two million, two hundred thirty-one", and thus it is an aban number.

Divisors: 1 29 42137939 1222000231