230971931 has 2 divisors, whose sum is σ = 230971932. Its totient is φ = 230971930.

The previous prime is 230971891. The next prime is 230971943. The reversal of 230971931 is 139179032.

230971931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 230971931 - 2¹⁴ = 230955547 is a prime.

It is a super-2 number, since 2×230971931² = 106696065819737522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 230971891 and 230971900.

It is not a weakly prime, because it can be changed into another prime (230971031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115485965 + 115485966.

It is an arithmetic number, because the mean of its divisors is an integer number (115485966).

Almost surely, 2^230971931 is an apocalyptic number.

230971931 is a deficient number, since it is larger than the sum of its proper divisors (1).

230971931 is an equidigital number, since it uses as much as digits as its factorization.

230971931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 230971931 is about 15197.7607232118. The cubic root of 230971931 is about 613.5543907867.

The spelling of 230971931 in words is "two hundred thirty million, nine hundred seventy-one thousand, nine hundred thirty-one".