345771331 has 2 divisors, whose sum is σ = 345771332. Its totient is φ = 345771330.

The previous prime is 345771323. The next prime is 345771383. The reversal of 345771331 is 133177543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345771331 - 2³ = 345771323 is a prime.

It is a super-2 number, since 2×345771331² = 239115626683023122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345771131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172885665 + 172885666.

It is an arithmetic number, because the mean of its divisors is an integer number (172885666).

Almost surely, 2^345771331 is an apocalyptic number.

345771331 is a deficient number, since it is larger than the sum of its proper divisors (1).

345771331 is an equidigital number, since it uses as much as digits as its factorization.

345771331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 34.

The square root of 345771331 is about 18594.9275610313. The cubic root of 345771331 is about 701.8802044211.

The spelling of 345771331 in words is "three hundred forty-five million, seven hundred seventy-one thousand, three hundred thirty-one".