315221150321 has 32 divisors (see below), whose sum is σ = 413776542720. Its totient is φ = 232648977600.

The previous prime is 315221150317. The next prime is 315221150329. The reversal of 315221150321 is 123051122513.

It is a cyclic number.

It is not a de Polignac number, because 315221150321 - 2² = 315221150317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315221150329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7626491 + ... + 7667711.

It is an arithmetic number, because the mean of its divisors is an integer number (12930516960).

Almost surely, 2^315221150321 is an apocalyptic number.

It is an amenable number.

315221150321 is a deficient number, since it is larger than the sum of its proper divisors (98555392399).

315221150321 is a wasteful number, since it uses less digits than its factorization.

315221150321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46485.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 315221150321 its reverse (123051122513), we get a palindrome (438272272834).

The spelling of 315221150321 in words is "three hundred fifteen billion, two hundred twenty-one million, one hundred fifty thousand, three hundred twenty-one".