621230523451 has 2 divisors, whose sum is σ = 621230523452. Its totient is φ = 621230523450.

The previous prime is 621230523437. The next prime is 621230523469. The reversal of 621230523451 is 154325032126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621230523451 - 2²⁷ = 621096305723 is a prime.

It is not a weakly prime, because it can be changed into another prime (621230523491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310615261725 + 310615261726.

It is an arithmetic number, because the mean of its divisors is an integer number (310615261726).

Almost surely, 2^621230523451 is an apocalyptic number.

621230523451 is a deficient number, since it is larger than the sum of its proper divisors (1).

621230523451 is an equidigital number, since it uses as much as digits as its factorization.

621230523451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 621230523451 its reverse (154325032126), we get a palindrome (775555555577).

The spelling of 621230523451 in words is "six hundred twenty-one billion, two hundred thirty million, five hundred twenty-three thousand, four hundred fifty-one".