621008212 has 24 divisors (see below), whose sum is σ = 1187736480. Its totient is φ = 281758560.

The previous prime is 621008197. The next prime is 621008231. The reversal of 621008212 is 212800126.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11839 + ... + 37177.

It is an arithmetic number, because the mean of its divisors is an integer number (49489020).

Almost surely, 2^621008212 is an apocalyptic number.

It is an amenable number.

621008212 is a deficient number, since it is larger than the sum of its proper divisors (566728268).

621008212 is a wasteful number, since it uses less digits than its factorization.

621008212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25911 (or 25909 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 621008212 is about 24920.0363563138. The cubic root of 621008212 is about 853.1638546210.

Adding to 621008212 its reverse (212800126), we get a palindrome (833808338).

The spelling of 621008212 in words is "six hundred twenty-one million, eight thousand, two hundred twelve".