621055212 has 24 divisors (see below), whose sum is σ = 1488295536. Its totient is φ = 201423168.

The previous prime is 621055163. The next prime is 621055229. The reversal of 621055212 is 212550126.

It is a happy 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, 698943 + ... + 699830.

It is an arithmetic number, because the mean of its divisors is an integer number (62012314).

Almost surely, 2^621055212 is an apocalyptic number.

It is an amenable number.

621055212 is an abundant number, since it is smaller than the sum of its proper divisors (867240324).

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

621055212 is a wasteful number, since it uses less digits than its factorization.

621055212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398817 (or 1398815 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 621055212 is about 24920.9793547525. The cubic root of 621055212 is about 853.1853775192.

The spelling of 621055212 in words is "six hundred twenty-one million, fifty-five thousand, two hundred twelve".