212256644425 has 12 divisors (see below), whose sum is σ = 300797987776. Its totient is φ = 145547413200.

The previous prime is 212256644401. The next prime is 212256644443. The reversal of 212256644425 is 524446652212.

It is not a de Polignac number, because 212256644425 - 2⁹ = 212256643913 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 606447381 + ... + 606447730.

Almost surely, 2^212256644425 is an apocalyptic number.

212256644425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212256644425 is a deficient number, since it is larger than the sum of its proper divisors (88541343351).

212256644425 is a wasteful number, since it uses less digits than its factorization.

212256644425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212895128 (or 1212895123 counting only the distinct ones).

The product of its digits is 921600, while the sum is 43.

The spelling of 212256644425 in words is "two hundred twelve billion, two hundred fifty-six million, six hundred forty-four thousand, four hundred twenty-five".