213873925 has 6 divisors (see below), whose sum is σ = 265203698. Its totient is φ = 171099120.

The previous prime is 213873911. The next prime is 213873943. The reversal of 213873925 is 529378312.

It can be written as a sum of positive squares in 3 ways, for example, as 12432676 + 201441249 = 3526^2 + 14193^2 .

It is not a de Polignac number, because 213873925 - 2⁵ = 213873893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4277454 + ... + 4277503.

Almost surely, 2^213873925 is an apocalyptic number.

213873925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213873925 is a deficient number, since it is larger than the sum of its proper divisors (51329773).

213873925 is an equidigital number, since it uses as much as digits as its factorization.

213873925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8554967 (or 8554962 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 213873925 is about 14624.4290486843. The cubic root of 213873925 is about 598.0249175868.

The spelling of 213873925 in words is "two hundred thirteen million, eight hundred seventy-three thousand, nine hundred twenty-five".