725531226 has 64 divisors (see below), whose sum is σ = 1757061120. Its totient is φ = 195099840.

The previous prime is 725531221. The next prime is 725531237. The reversal of 725531226 is 622135527.

It is not an unprimeable number, because it can be changed into a prime (725531221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122391 + ... + 128181.

It is an arithmetic number, because the mean of its divisors is an integer number (27454080).

Almost surely, 2^725531226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725531226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878530560).

725531226 is an abundant number, since it is smaller than the sum of its proper divisors (1031529894).

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

725531226 is a wasteful number, since it uses less digits than its factorization.

725531226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5979.

The product of its digits is 25200, while the sum is 33.

The square root of 725531226 is about 26935.6868484915. The cubic root of 725531226 is about 898.5702508764.

The spelling of 725531226 in words is "seven hundred twenty-five million, five hundred thirty-one thousand, two hundred twenty-six".