212393770 has 16 divisors (see below), whose sum is σ = 391200480. Its totient is φ = 82981584.

The previous prime is 212393759. The next prime is 212393771. The reversal of 212393770 is 77393212.

It is a super-2 number, since 2×212393770² = 90222227069625800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212393771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246540 + ... + 247399.

It is an arithmetic number, because the mean of its divisors is an integer number (24450030).

Almost surely, 2^212393770 is an apocalyptic number.

212393770 is a deficient number, since it is larger than the sum of its proper divisors (178806710).

212393770 is a wasteful number, since it uses less digits than its factorization.

212393770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493989.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 212393770 is about 14573.7356226878. The cubic root of 212393770 is about 596.6421411778.

The spelling of 212393770 in words is "two hundred twelve million, three hundred ninety-three thousand, seven hundred seventy".