345191031 has 32 divisors (see below), whose sum is σ = 556896000. Its totient is φ = 210488544.

The previous prime is 345191003. The next prime is 345191047. The reversal of 345191031 is 130191543.

It is not a de Polignac number, because 345191031 - 2⁵ = 345190999 is a prime.

It is a super-2 number, since 2×345191031² = 238313695765685922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 345190986 and 345191004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345191531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3276 + ... + 26478.

It is an arithmetic number, because the mean of its divisors is an integer number (17403000).

Almost surely, 2^345191031 is an apocalyptic number.

345191031 is a deficient number, since it is larger than the sum of its proper divisors (211704969).

345191031 is a wasteful number, since it uses less digits than its factorization.

345191031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23260 (or 23254 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 345191031 is about 18579.3172910094. The cubic root of 345191031 is about 701.4873348052.

The spelling of 345191031 in words is "three hundred forty-five million, one hundred ninety-one thousand, thirty-one".