345205031 has 4 divisors (see below), whose sum is σ = 345306864. Its totient is φ = 345103200.

The previous prime is 345205027. The next prime is 345205033. The reversal of 345205031 is 130502543.

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 345205031 - 2² = 345205027 is a prime.

It is a super-2 number, since 2×345205031² = 238333026855421922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345204988 and 345205006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345205033) 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, 45650 + ... + 52671.

It is an arithmetic number, because the mean of its divisors is an integer number (86326716).

Almost surely, 2^345205031 is an apocalyptic number.

345205031 is a deficient number, since it is larger than the sum of its proper divisors (101833).

345205031 is an equidigital number, since it uses as much as digits as its factorization.

345205031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101832.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 345205031 is about 18579.6940502259. The cubic root of 345205031 is about 701.4968181434.

Adding to 345205031 its reverse (130502543), we get a palindrome (475707574).

The spelling of 345205031 in words is "three hundred forty-five million, two hundred five thousand, thirty-one".