212018807025 has 27 divisors (see below), whose sum is σ = 379761612321. Its totient is φ = 113073013440.

The previous prime is 212018807017. The next prime is 212018807047. The reversal of 212018807025 is 520708810212.

The square root of 212018807025 is 460455.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 73089663201 + 138929143824 = 270351^2 + 372732^2 .

It is not a de Polignac number, because 212018807025 - 2³ = 212018807017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6891477 + ... + 6922173.

Almost surely, 2^212018807025 is an apocalyptic number.

212018807025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

212018807025 is the 460455-th square number.

212018807025 is the 230228-th centered octagonal number.

It is an amenable number.

212018807025 is a deficient number, since it is larger than the sum of its proper divisors (167742805296).

212018807025 is an frugal number, since it uses more digits than its factorization.

212018807025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61410 (or 30705 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

Multiplying 212018807025 by its sum of digits (36), we get a square (7632677052900 = 2762730²).

The spelling of 212018807025 in words is "two hundred twelve billion, eighteen million, eight hundred seven thousand, twenty-five".