621565130 has 32 divisors (see below), whose sum is σ = 1144786176. Its totient is φ = 242875584.

The previous prime is 621565123. The next prime is 621565193. The reversal of 621565130 is 31565126.

It is a junction number, because it is equal to n+sod(n) for n = 621565093 and 621565102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354917 + ... + 356663.

It is an arithmetic number, because the mean of its divisors is an integer number (35774568).

Almost surely, 2^621565130 is an apocalyptic number.

621565130 is a deficient number, since it is larger than the sum of its proper divisors (523221046).

621565130 is a wasteful number, since it uses less digits than its factorization.

621565130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 621565130 is about 24931.2079530856. The cubic root of 621565130 is about 853.4188165435.

The spelling of 621565130 in words is "six hundred twenty-one million, five hundred sixty-five thousand, one hundred thirty".