315235937381 has 4 divisors (see below), whose sum is σ = 315467559564. Its totient is φ = 315004315200.

The previous prime is 315235937371. The next prime is 315235937389. The reversal of 315235937381 is 183739532513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183739532513 = 593 ⋅309847441.

It can be written as a sum of positive squares in 2 ways, for example, as 123488285281 + 191747652100 = 351409^2 + 437890^2 .

It is a cyclic number.

It is not a de Polignac number, because 315235937381 - 2³⁴ = 298056068197 is a prime.

It is a super-2 number, since 2×315235937381² (a number of 24 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 (315235937389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115809050 + ... + 115811771.

It is an arithmetic number, because the mean of its divisors is an integer number (78866889891).

Almost surely, 2^315235937381 is an apocalyptic number.

It is an amenable number.

315235937381 is a deficient number, since it is larger than the sum of its proper divisors (231622183).

315235937381 is a wasteful number, since it uses less digits than its factorization.

315235937381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231622182.

The product of its digits is 2041200, while the sum is 50.

The spelling of 315235937381 in words is "three hundred fifteen billion, two hundred thirty-five million, nine hundred thirty-seven thousand, three hundred eighty-one".