621621022 has 16 divisors (see below), whose sum is σ = 1019411712. Its totient is φ = 281940120.

The previous prime is 621620999. The next prime is 621621037. The reversal of 621621022 is 220126126.

621621022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 621620984 and 621621002.

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, 20328 + ... + 40699.

It is an arithmetic number, because the mean of its divisors is an integer number (63713232).

Almost surely, 2^621621022 is an apocalyptic number.

621621022 is a deficient number, since it is larger than the sum of its proper divisors (397790690).

621621022 is a wasteful number, since it uses less digits than its factorization.

621621022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61503.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 621621022 is about 24932.3288523154. The cubic root of 621621022 is about 853.4443959787. Note that the first 3 decimals are identical.

Adding to 621621022 its reverse (220126126), we get a palindrome (841747148).

The spelling of 621621022 in words is "six hundred twenty-one million, six hundred twenty-one thousand, twenty-two".