315421031 has 4 divisors (see below), whose sum is σ = 317510064. Its totient is φ = 313332000.

The previous prime is 315421019. The next prime is 315421069. The reversal of 315421031 is 130124513.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 315421031 - 2¹⁴ = 315404647 is a prime.

It is a super-2 number, since 2×315421031² = 198980853594205922, 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 = 315420994 and 315421012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315421531) 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, 1044290 + ... + 1044591.

It is an arithmetic number, because the mean of its divisors is an integer number (79377516).

Almost surely, 2^315421031 is an apocalyptic number.

315421031 is a deficient number, since it is larger than the sum of its proper divisors (2089033).

315421031 is a wasteful number, since it uses less digits than its factorization.

315421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089032.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 315421031 is about 17760.0965932058. The cubic root of 315421031 is about 680.7122230572.

Adding to 315421031 its reverse (130124513), we get a palindrome (445545544).

The spelling of 315421031 in words is "three hundred fifteen million, four hundred twenty-one thousand, thirty-one".