345047531 has 2 divisors, whose sum is σ = 345047532. Its totient is φ = 345047530.

The previous prime is 345047503. The next prime is 345047557. The reversal of 345047531 is 135740543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345047531 is a prime.

It is a super-2 number, since 2×345047531² = 238115597298391922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345047831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172523765 + 172523766.

It is an arithmetic number, because the mean of its divisors is an integer number (172523766).

Almost surely, 2^345047531 is an apocalyptic number.

345047531 is a deficient number, since it is larger than the sum of its proper divisors (1).

345047531 is an equidigital number, since it uses as much as digits as its factorization.

345047531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 345047531 is about 18575.4550684499. The cubic root of 345047531 is about 701.3901158011.

The spelling of 345047531 in words is "three hundred forty-five million, forty-seven thousand, five hundred thirty-one".