212318780 has 24 divisors (see below), whose sum is σ = 472097808. Its totient is φ = 79931648.

The previous prime is 212318753. The next prime is 212318791. The reversal of 212318780 is 87813212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311894 + ... + 312573.

It is an arithmetic number, because the mean of its divisors is an integer number (19670742).

Almost surely, 2^212318780 is an apocalyptic number.

212318780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212318780 is an abundant number, since it is smaller than the sum of its proper divisors (259779028).

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

212318780 is a wasteful number, since it uses less digits than its factorization.

212318780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624493 (or 624491 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 212318780 is about 14571.1626166205. The cubic root of 212318780 is about 596.5719139752.

The spelling of 212318780 in words is "two hundred twelve million, three hundred eighteen thousand, seven hundred eighty".