621401315 has 4 divisors (see below), whose sum is σ = 745681584. Its totient is φ = 497121048.

The previous prime is 621401269. The next prime is 621401321. The reversal of 621401315 is 513104126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621401315 - 2⁸ = 621401059 is a prime.

It is a super-2 number, since 2×621401315² = 772279188567458450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62140127 + ... + 62140136.

It is an arithmetic number, because the mean of its divisors is an integer number (186420396).

Almost surely, 2^621401315 is an apocalyptic number.

621401315 is a deficient number, since it is larger than the sum of its proper divisors (124280269).

621401315 is a wasteful number, since it uses less digits than its factorization.

621401315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124280268.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 621401315 is about 24927.9223963811. The cubic root of 621401315 is about 853.3438364220.

The spelling of 621401315 in words is "six hundred twenty-one million, four hundred one thousand, three hundred fifteen".