315231043 has 4 divisors (see below), whose sum is σ = 315286840. Its totient is φ = 315175248.

The previous prime is 315231029. The next prime is 315231053. The reversal of 315231043 is 340132513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340132513 = 7 ⋅48590359.

It is a cyclic number.

It is not a de Polignac number, because 315231043 - 2²⁵ = 281676611 is a prime.

It is a super-2 number, since 2×315231043² = 198741220941735698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (315231013) 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, 18330 + ... + 31087.

It is an arithmetic number, because the mean of its divisors is an integer number (78821710).

Almost surely, 2^315231043 is an apocalyptic number.

315231043 is a deficient number, since it is larger than the sum of its proper divisors (55797).

315231043 is an equidigital number, since it uses as much as digits as its factorization.

315231043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55796.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 315231043 is about 17754.7470553652. The cubic root of 315231043 is about 680.5755241524.

Adding to 315231043 its reverse (340132513), we get a palindrome (655363556).

The spelling of 315231043 in words is "three hundred fifteen million, two hundred thirty-one thousand, forty-three".