212508045 has 24 divisors (see below), whose sum is σ = 369907200. Its totient is φ = 112857696.

The previous prime is 212508031. The next prime is 212508053. The reversal of 212508045 is 540805212.

It is a happy number.

It is not a de Polignac number, because 212508045 - 2⁷ = 212507917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876 + ... + 20634.

It is an arithmetic number, because the mean of its divisors is an integer number (15412800).

Almost surely, 2^212508045 is an apocalyptic number.

It is an amenable number.

212508045 is a deficient number, since it is larger than the sum of its proper divisors (157399155).

212508045 is a wasteful number, since it uses less digits than its factorization.

212508045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009 (or 20006 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 212508045 is about 14577.6556757251. The cubic root of 212508045 is about 596.7491265136.

The spelling of 212508045 in words is "two hundred twelve million, five hundred eight thousand, forty-five".