621422258 has 6 divisors (see below), whose sum is σ = 932186271. Its totient is φ = 310693502.

The previous prime is 621422251. The next prime is 621422287. The reversal of 621422258 is 852224126.

It can be written as a sum of positive squares in only one way, i.e., 310711129 + 310711129 = 17627^2 + 17627^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17627.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621422251) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26441 + ... + 44067.

Almost surely, 2^621422258 is an apocalyptic number.

621422258 is a deficient number, since it is larger than the sum of its proper divisors (310764013).

621422258 is an frugal number, since it uses more digits than its factorization.

621422258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35256 (or 17629 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 621422258 is about 24928.3424639505. The cubic root of 621422258 is about 853.3534230229.

Multiplying 621422258 by its sum of digits (32), we get a square (19885512256 = 141016²).

The spelling of 621422258 in words is "six hundred twenty-one million, four hundred twenty-two thousand, two hundred fifty-eight".