621568130 has 8 divisors (see below), whose sum is σ = 1118822652. Its totient is φ = 248627248.

The previous prime is 621568097. The next prime is 621568163. The reversal of 621568130 is 31865126.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (621568097) and next prime (621568163).

It can be written as a sum of positive squares in 2 ways, for example, as 588402049 + 33166081 = 24257^2 + 5759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 31078397 + ... + 31078416.

Almost surely, 2^621568130 is an apocalyptic number.

621568130 is a deficient number, since it is larger than the sum of its proper divisors (497254522).

621568130 is a wasteful number, since it uses less digits than its factorization.

621568130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62156820.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 621568130 is about 24931.2681185695. The cubic root of 621568130 is about 853.4201895572.

The spelling of 621568130 in words is "six hundred twenty-one million, five hundred sixty-eight thousand, one hundred thirty".