212064280 has 32 divisors (see below), whose sum is σ = 478321200. Its totient is φ = 84616576.

The previous prime is 212064277. The next prime is 212064283. The reversal of 212064280 is 82460212.

212064280 = 3753² + 3754² + ... + 3767².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212064277) and next prime (212064283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212064283) 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, 10434 + ... + 23086.

Almost surely, 2^212064280 is an apocalyptic number.

212064280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212064280 is an abundant number, since it is smaller than the sum of its proper divisors (266256920).

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

212064280 is a wasteful number, since it uses less digits than its factorization.

212064280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13083 (or 13079 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 212064280 is about 14562.4269955252. The cubic root of 212064280 is about 596.3334545289. Note that the first 3 decimals are identical.

The spelling of 212064280 in words is "two hundred twelve million, sixty-four thousand, two hundred eighty".