621130481 has 2 divisors, whose sum is σ = 621130482. Its totient is φ = 621130480.

The previous prime is 621130459. The next prime is 621130493. The reversal of 621130481 is 184031126.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528586081 + 92544400 = 22991^2 + 9620^2 .

It is a cyclic number.

It is not a de Polignac number, because 621130481 - 2¹⁴ = 621114097 is a prime.

It is a super-2 number, since 2×621130481² = 771606148854582722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621130481.

It is not a weakly prime, because it can be changed into another prime (621130421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310565240 + 310565241.

It is an arithmetic number, because the mean of its divisors is an integer number (310565241).

Almost surely, 2^621130481 is an apocalyptic number.

It is an amenable number.

621130481 is a deficient number, since it is larger than the sum of its proper divisors (1).

621130481 is an equidigital number, since it uses as much as digits as its factorization.

621130481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 621130481 is about 24922.4894623310. The cubic root of 621130481 is about 853.2198434919.

The spelling of 621130481 in words is "six hundred twenty-one million, one hundred thirty thousand, four hundred eighty-one".