212976025 has 6 divisors (see below), whose sum is σ = 264090302. Its totient is φ = 170380800.

The previous prime is 212976019. The next prime is 212976041. The reversal of 212976025 is 520679212.

It can be written as a sum of positive squares in 3 ways, for example, as 45118089 + 167857936 = 6717^2 + 12956^2 .

It is not a de Polignac number, because 212976025 - 2⁵ = 212975993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4259496 + ... + 4259545.

Almost surely, 2^212976025 is an apocalyptic number.

212976025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212976025 is a deficient number, since it is larger than the sum of its proper divisors (51114277).

212976025 is an equidigital number, since it uses as much as digits as its factorization.

212976025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8519051 (or 8519046 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 212976025 is about 14593.6981262461. The cubic root of 212976025 is about 597.1868541121.

The spelling of 212976025 in words is "two hundred twelve million, nine hundred seventy-six thousand, twenty-five".