316251135310021 has 16 divisors (see below), whose sum is σ = 335445694391808. Its totient is φ = 297122320051200.

The previous prime is 316251135310009. The next prime is 316251135310027. The reversal of 316251135310021 is 120013531152613.

It is a cyclic number.

It is not a de Polignac number, because 316251135310021 - 2⁴⁷ = 175513646954693 is a prime.

It is a super-2 number, since 2×316251135310021² (a number of 30 digits) 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 (316251135310027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754150476 + ... + 754569706.

It is an arithmetic number, because the mean of its divisors is an integer number (20965355899488).

Almost surely, 2^{316251135310021} is an apocalyptic number.

It is an amenable number.

316251135310021 is a deficient number, since it is larger than the sum of its proper divisors (19194559081787).

316251135310021 is a wasteful number, since it uses less digits than its factorization.

316251135310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497532.

The product of its (nonzero) digits is 16200, while the sum is 34.

Adding to 316251135310021 its reverse (120013531152613), we get a palindrome (436264666462634).

The spelling of 316251135310021 in words is "three hundred sixteen trillion, two hundred fifty-one billion, one hundred thirty-five million, three hundred ten thousand, twenty-one".