212156458525 has 24 divisors (see below), whose sum is σ = 287123926464. Its totient is φ = 154223510400.

The previous prime is 212156458511. The next prime is 212156458559. The reversal of 212156458525 is 525854651212.

It is a happy number.

It is not a de Polignac number, because 212156458525 - 2⁹ = 212156458013 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 412912 + ... + 771238.

It is an arithmetic number, because the mean of its divisors is an integer number (11963496936).

Almost surely, 2^212156458525 is an apocalyptic number.

212156458525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212156458525 is a deficient number, since it is larger than the sum of its proper divisors (74967467939).

212156458525 is a wasteful number, since it uses less digits than its factorization.

212156458525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360501 (or 360496 counting only the distinct ones).

The product of its digits is 960000, while the sum is 46.

The spelling of 212156458525 in words is "two hundred twelve billion, one hundred fifty-six million, four hundred fifty-eight thousand, five hundred twenty-five".