340645131 has 12 divisors (see below), whose sum is σ = 494889408. Its totient is φ = 225783024.

The previous prime is 340645127. The next prime is 340645153. The reversal of 340645131 is 131546043.

340645131 is a `hidden beast` number, since 3 + 4 + 0 + 645 + 13 + 1 = 666.

It is not a de Polignac number, because 340645131 - 2² = 340645127 is a prime.

It is a super-2 number, since 2×340645131² = 232078210548014322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 340645095 and 340645104.

It is not an unprimeable number, because it can be changed into a prime (340645171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107835 + ... + 110948.

It is an arithmetic number, because the mean of its divisors is an integer number (41240784).

Almost surely, 2^340645131 is an apocalyptic number.

340645131 is a deficient number, since it is larger than the sum of its proper divisors (154244277).

340645131 is a wasteful number, since it uses less digits than its factorization.

340645131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218962 (or 218959 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 340645131 is about 18456.5741945790. The cubic root of 340645131 is about 698.3943681816.

The spelling of 340645131 in words is "three hundred forty million, six hundred forty-five thousand, one hundred thirty-one".