345206531 has 4 divisors (see below), whose sum is σ = 345327792. Its totient is φ = 345085272.

The previous prime is 345206507. The next prime is 345206549. The reversal of 345206531 is 135602543.

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 345206531 - 2¹⁴ = 345190147 is a prime.

It is a super-2 number, since 2×345206531² = 238335098090107922, 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 = 345206494 and 345206503.

It is not an unprimeable number, because it can be changed into a prime (345206591) 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, 56255 + ... + 62088.

It is an arithmetic number, because the mean of its divisors is an integer number (86331948).

Almost surely, 2^345206531 is an apocalyptic number.

345206531 is a deficient number, since it is larger than the sum of its proper divisors (121261).

345206531 is a wasteful number, since it uses less digits than its factorization.

345206531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121260.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 345206531 is about 18579.7344168317. The cubic root of 345206531 is about 701.4978342002.

The spelling of 345206531 in words is "three hundred forty-five million, two hundred six thousand, five hundred thirty-one".