212816925 has 36 divisors (see below), whose sum is σ = 382031104. Its totient is φ = 113248800.

The previous prime is 212816917. The next prime is 212816927. The reversal of 212816925 is 529618212.

It is not a de Polignac number, because 212816925 - 2³ = 212816917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212816925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212816927) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 143940 + ... + 145410.

Almost surely, 2^212816925 is an apocalyptic number.

212816925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212816925 is a deficient number, since it is larger than the sum of its proper divisors (169214179).

212816925 is a wasteful number, since it uses less digits than its factorization.

212816925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130 (or 2122 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 212816925 is about 14588.2461248774. The cubic root of 212816925 is about 597.0381110827.

The spelling of 212816925 in words is "two hundred twelve million, eight hundred sixteen thousand, nine hundred twenty-five".