212422920 has 64 divisors (see below), whose sum is σ = 654505920. Its totient is φ = 55113984.

The previous prime is 212422901. The next prime is 212422921. The reversal of 212422920 is 29224212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (212422921) 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, 19482 + ... + 28361.

It is an arithmetic number, because the mean of its divisors is an integer number (10226655).

Almost surely, 2^212422920 is an apocalyptic number.

212422920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212422920 is an abundant number, since it is smaller than the sum of its proper divisors (442083000).

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

212422920 is a wasteful number, since it uses less digits than its factorization.

212422920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47894 (or 47890 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 212422920 is about 14574.7356751332. The cubic root of 212422920 is about 596.6694353287.

The spelling of 212422920 in words is "two hundred twelve million, four hundred twenty-two thousand, nine hundred twenty".