212894574025 has 27 divisors (see below), whose sum is σ = 307112857191. Its totient is φ = 145973777040.

The previous prime is 212894574023. The next prime is 212894574037. The reversal of 212894574025 is 520475498212.

The square root of 212894574025 is 461405.

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

It can be written as a sum of positive squares in only one way, i.e., 76642046649 + 136252527376 = 276843^2 + 369124^2 .

It is not a de Polignac number, because 212894574025 - 2¹ = 212894574023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 212894574025.

It is not an unprimeable number, because it can be changed into a prime (212894574023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 16142584 + ... + 16155766.

Almost surely, 2^212894574025 is an apocalyptic number.

212894574025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

212894574025 is the 461405-th square number.

212894574025 is the 230703-rd centered octagonal number.

It is an amenable number.

212894574025 is a deficient number, since it is larger than the sum of its proper divisors (94218283166).

212894574025 is an frugal number, since it uses more digits than its factorization.

212894574025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26390 (or 13195 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

Multiplying 212894574025 by its sum of digits (49), we get a square (10431834127225 = 3229835²).

212894574025 divided by its sum of digits (49) gives a square (4344787225 = 65915²).

The spelling of 212894574025 in words is "two hundred twelve billion, eight hundred ninety-four million, five hundred seventy-four thousand, twenty-five".