431256213 has 12 divisors (see below), whose sum is σ = 627108300. Its totient is φ = 285573696.

The previous prime is 431256179. The next prime is 431256223. The reversal of 431256213 is 312652134.

431256213 is a `hidden beast` number, since 4 + 31 + 2 + 5 + 621 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 239073444 + 192182769 = 15462^2 + 13863^2 .

It is not a de Polignac number, because 431256213 - 2⁶ = 431256149 is a prime.

It is a super-2 number, since 2×431256213² = 371963842502202738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431256223) 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, 159456 + ... + 162137.

It is an arithmetic number, because the mean of its divisors is an integer number (52259025).

Almost surely, 2^431256213 is an apocalyptic number.

It is an amenable number.

431256213 is a deficient number, since it is larger than the sum of its proper divisors (195852087).

431256213 is a wasteful number, since it uses less digits than its factorization.

431256213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321748 (or 321745 counting only the distinct ones).

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

The square root of 431256213 is about 20766.7092482174. The cubic root of 431256213 is about 755.5185321447.

The spelling of 431256213 in words is "four hundred thirty-one million, two hundred fifty-six thousand, two hundred thirteen".