725222220 has 48 divisors (see below), whose sum is σ = 2073835008. Its totient is φ = 189277120.

The previous prime is 725222209. The next prime is 725222233. The reversal of 725222220 is 22222527.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125766 + ... + 131405.

It is an arithmetic number, because the mean of its divisors is an integer number (43204896).

Almost surely, 2^725222220 is an apocalyptic number.

It is an amenable number.

725222220 is an abundant number, since it is smaller than the sum of its proper divisors (1348612788).

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

725222220 is a wasteful number, since it uses less digits than its factorization.

725222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257230 (or 257228 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 725222220 is about 26929.9502413205. The cubic root of 725222220 is about 898.4426648091.

Adding to 725222220 its reverse (22222527), we get a palindrome (747444747).

The spelling of 725222220 in words is "seven hundred twenty-five million, two hundred twenty-two thousand, two hundred twenty".