345445531 has 8 divisors (see below), whose sum is σ = 359472960. Its totient is φ = 331690632.

The previous prime is 345445523. The next prime is 345445537. The reversal of 345445531 is 135544543.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 345445531 - 2³ = 345445523 is a prime.

It is a super-2 number, since 2×345445531² = 238665229775743922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345445537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65545 + ... + 70618.

It is an arithmetic number, because the mean of its divisors is an integer number (44934120).

Almost surely, 2^345445531 is an apocalyptic number.

345445531 is a deficient number, since it is larger than the sum of its proper divisors (14027429).

345445531 is a wasteful number, since it uses less digits than its factorization.

345445531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136265.

The product of its digits is 72000, while the sum is 34.

The square root of 345445531 is about 18586.1650428484. The cubic root of 345445531 is about 701.6596883273.

The spelling of 345445531 in words is "three hundred forty-five million, four hundred forty-five thousand, five hundred thirty-one".