316521894381 has 16 divisors (see below), whose sum is σ = 526166266368. Its totient is φ = 164426958000.

The previous prime is 316521894347. The next prime is 316521894383. The reversal of 316521894381 is 183498125613.

316521894381 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 316521894381 - 2⁹ = 316521893869 is a prime.

It is a super-2 number, since 2×316521894381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316521894383) 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, 685112095 + ... + 685112556.

It is an arithmetic number, because the mean of its divisors is an integer number (32885391648).

Almost surely, 2^316521894381 is an apocalyptic number.

It is an amenable number.

316521894381 is a deficient number, since it is larger than the sum of its proper divisors (209644371987).

316521894381 is a wasteful number, since it uses less digits than its factorization.

316521894381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370224672.

The product of its digits is 1244160, while the sum is 51.

The spelling of 316521894381 in words is "three hundred sixteen billion, five hundred twenty-one million, eight hundred ninety-four thousand, three hundred eighty-one".