725221650 has 48 divisors (see below), whose sum is σ = 1802340000. Its totient is φ = 192984960.

The previous prime is 725221613. The next prime is 725221667. The reversal of 725221650 is 56122527.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70006 + ... + 79694.

It is an arithmetic number, because the mean of its divisors is an integer number (37548750).

Almost surely, 2^725221650 is an apocalyptic number.

725221650 is an abundant number, since it is smaller than the sum of its proper divisors (1077118350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

725221650 is a wasteful number, since it uses less digits than its factorization.

725221650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203 (or 10198 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 725221650 is about 26929.9396583060. The cubic root of 725221650 is about 898.4424294273.

The spelling of 725221650 in words is "seven hundred twenty-five million, two hundred twenty-one thousand, six hundred fifty".