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222131021 = 7163194681
BaseRepresentation
bin11010011110101…
…11001101001101
3120110222102110212
431033113031031
5423331143041
634013012205
75335040210
oct1517271515
9513872425
10222131021
11104429362
1262484065
1337035698
1421703777
151477b8eb
hexd3d734d

222131021 has 8 divisors (see below), whose sum is σ = 255422784. Its totient is φ = 189228960.

The previous prime is 222130999. The next prime is 222131023. The reversal of 222131021 is 120131222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222131021 - 214 = 222114637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222130987 and 222131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222131023) 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 7 ways as a sum of consecutive naturals, for example, 96200 + ... + 98481.

It is an arithmetic number, because the mean of its divisors is an integer number (31927848).

Almost surely, 2222131021 is an apocalyptic number.

It is an amenable number.

222131021 is a deficient number, since it is larger than the sum of its proper divisors (33291763).

222131021 is a wasteful number, since it uses less digits than its factorization.

222131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194851.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 222131021 is about 14904.0605540906. The cubic root of 222131021 is about 605.6239911297.

Adding to 222131021 its reverse (120131222), we get a palindrome (342262243).

The spelling of 222131021 in words is "two hundred twenty-two million, one hundred thirty-one thousand, twenty-one".