212255790 has 32 divisors (see below), whose sum is σ = 510191136. Its totient is φ = 56515200.

The previous prime is 212255789. The next prime is 212255801. The reversal of 212255790 is 97552212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15984 + ... + 26076.

It is an arithmetic number, because the mean of its divisors is an integer number (15943473).

Almost surely, 2^212255790 is an apocalyptic number.

212255790 is an abundant number, since it is smaller than the sum of its proper divisors (297935346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212255790 is a wasteful number, since it uses less digits than its factorization.

212255790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10804.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 212255790 is about 14569.0009952639. Note that the first 3 decimals coincide. The cubic root of 212255790 is about 596.5129118439.

The spelling of 212255790 in words is "two hundred twelve million, two hundred fifty-five thousand, seven hundred ninety".