315221222431 has 4 divisors (see below), whose sum is σ = 318167215272. Its totient is φ = 312275229592.

The previous prime is 315221222419. The next prime is 315221222447. The reversal of 315221222431 is 134222122513.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315221222431 - 2¹¹ = 315221220383 is a prime.

It is a super-2 number, since 2×315221222431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315221222431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315221222411) 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, 1472996260 + ... + 1472996473.

It is an arithmetic number, because the mean of its divisors is an integer number (79541803818).

Almost surely, 2^315221222431 is an apocalyptic number.

315221222431 is a deficient number, since it is larger than the sum of its proper divisors (2945992841).

315221222431 is a wasteful number, since it uses less digits than its factorization.

315221222431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945992840.

The product of its digits is 5760, while the sum is 28.

Adding to 315221222431 its reverse (134222122513), we get a palindrome (449443344944).

The spelling of 315221222431 in words is "three hundred fifteen billion, two hundred twenty-one million, two hundred twenty-two thousand, four hundred thirty-one".