212530670 has 32 divisors (see below), whose sum is σ = 419116896. Its totient is φ = 76953600.

The previous prime is 212530657. The next prime is 212530679. The reversal of 212530670 is 76035212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212530679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22502 + ... + 30518.

It is an arithmetic number, because the mean of its divisors is an integer number (13097403).

Almost surely, 2^212530670 is an apocalyptic number.

212530670 is a deficient number, since it is larger than the sum of its proper divisors (206586226).

212530670 is a wasteful number, since it uses less digits than its factorization.

212530670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8276.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 212530670 is about 14578.4316714796. The cubic root of 212530670 is about 596.7703037038.

Adding to 212530670 its reverse (76035212), we get a palindrome (288565882).

The spelling of 212530670 in words is "two hundred twelve million, five hundred thirty thousand, six hundred seventy".