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1222661361 = 3407553787
BaseRepresentation
bin100100011100000…
…0101010011110001
310011012122122002010
41020320011103301
510001000130421
6321153513133
742204310245
oct11070052361
93135578063
101222661361
11578184639
122a15727a9
131663ca07c
14b854c425
1572515076
hex48e054f1

1222661361 has 4 divisors (see below), whose sum is σ = 1630215152. Its totient is φ = 815107572.

The previous prime is 1222661353. The next prime is 1222661413. The reversal of 1222661361 is 1631662221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1222661361 - 23 = 1222661353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222661311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203776891 + ... + 203776896.

It is an arithmetic number, because the mean of its divisors is an integer number (407553788).

Almost surely, 21222661361 is an apocalyptic number.

It is an amenable number.

1222661361 is a deficient number, since it is larger than the sum of its proper divisors (407553791).

1222661361 is an equidigital number, since it uses as much as digits as its factorization.

1222661361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407553790.

The product of its digits is 5184, while the sum is 30.

The square root of 1222661361 is about 34966.5749109060. The cubic root of 1222661361 is about 1069.3061449117.

The spelling of 1222661361 in words is "one billion, two hundred twenty-two million, six hundred sixty-one thousand, three hundred sixty-one".

Divisors: 1 3 407553787 1222661361