345518231 has 4 divisors (see below), whose sum is σ = 346388952. Its totient is φ = 344647512.

The previous prime is 345518227. The next prime is 345518233. The reversal of 345518231 is 132815543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345518231 - 2² = 345518227 is a prime.

It is a super-2 number, since 2×345518231² = 238765695906738722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345518233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434765 + ... + 435558.

It is an arithmetic number, because the mean of its divisors is an integer number (86597238).

Almost surely, 2^345518231 is an apocalyptic number.

345518231 is a deficient number, since it is larger than the sum of its proper divisors (870721).

345518231 is an equidigital number, since it uses as much as digits as its factorization.

345518231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870720.

The product of its digits is 14400, while the sum is 32.

The square root of 345518231 is about 18588.1206957562. The cubic root of 345518231 is about 701.7089069707.

The spelling of 345518231 in words is "three hundred forty-five million, five hundred eighteen thousand, two hundred thirty-one".