213431025 has 48 divisors (see below), whose sum is σ = 362476800. Its totient is φ = 110775360.

The previous prime is 213431017. The next prime is 213431051. The reversal of 213431025 is 520134312.

It is not a de Polignac number, because 213431025 - 2³ = 213431017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213430992 and 213431010.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 614902 + ... + 615248.

It is an arithmetic number, because the mean of its divisors is an integer number (7551600).

Almost surely, 2^213431025 is an apocalyptic number.

213431025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213431025 is a deficient number, since it is larger than the sum of its proper divisors (149045775).

213431025 is a wasteful number, since it uses less digits than its factorization.

213431025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 213431025 is about 14609.2787296293. The cubic root of 213431025 is about 597.6118264345.

Adding to 213431025 its reverse (520134312), we get a palindrome (733565337).

The spelling of 213431025 in words is "two hundred thirteen million, four hundred thirty-one thousand, twenty-five".