315138031 has 8 divisors (see below), whose sum is σ = 343676480. Its totient is φ = 287213472.

The previous prime is 315138029. The next prime is 315138037. The reversal of 315138031 is 130831513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 315138031 - 2¹ = 315138029 is a prime.

It is a super-2 number, since 2×315138031² = 198623957165113922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 315137987 and 315138005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315138037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152400 + ... + 154453.

It is an arithmetic number, because the mean of its divisors is an integer number (42959560).

Almost surely, 2^315138031 is an apocalyptic number.

315138031 is a deficient number, since it is larger than the sum of its proper divisors (28538449).

315138031 is a wasteful number, since it uses less digits than its factorization.

315138031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306945.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 315138031 is about 17752.1275063019. The cubic root of 315138031 is about 680.5085807479.

Adding to 315138031 its reverse (130831513), we get a palindrome (445969544).

The spelling of 315138031 in words is "three hundred fifteen million, one hundred thirty-eight thousand, thirty-one".