621725530 has 32 divisors (see below), whose sum is σ = 1189214784. Its totient is φ = 233216256.

The previous prime is 621725509. The next prime is 621725537. The reversal of 621725530 is 35527126.

621725530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 621725492 and 621725501.

It is not an unprimeable number, because it can be changed into a prime (621725537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41649 + ... + 54571.

It is an arithmetic number, because the mean of its divisors is an integer number (37162962).

Almost surely, 2^621725530 is an apocalyptic number.

621725530 is a deficient number, since it is larger than the sum of its proper divisors (567489254).

621725530 is a wasteful number, since it uses less digits than its factorization.

621725530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 621725530 is about 24934.4245973313. The cubic root of 621725530 is about 853.4922208140.

The spelling of 621725530 in words is "six hundred twenty-one million, seven hundred twenty-five thousand, five hundred thirty".