345256831 has 2 divisors, whose sum is σ = 345256832. Its totient is φ = 345256830.

The previous prime is 345256823. The next prime is 345256871. The reversal of 345256831 is 138652543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345256831 - 2³ = 345256823 is a prime.

It is a super-2 number, since 2×345256831² = 238404558704325122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345256871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172628415 + 172628416.

It is an arithmetic number, because the mean of its divisors is an integer number (172628416).

Almost surely, 2^345256831 is an apocalyptic number.

345256831 is a deficient number, since it is larger than the sum of its proper divisors (1).

345256831 is an equidigital number, since it uses as much as digits as its factorization.

345256831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 37.

The square root of 345256831 is about 18581.0879929029. The cubic root of 345256831 is about 701.5319042657.

The spelling of 345256831 in words is "three hundred forty-five million, two hundred fifty-six thousand, eight hundred thirty-one".