725221706 has 8 divisors (see below), whose sum is σ = 1186726464. Its totient is φ = 329646220.

The previous prime is 725221699. The next prime is 725221729. The reversal of 725221706 is 607122527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16482290 + ... + 16482333.

It is an arithmetic number, because the mean of its divisors is an integer number (148340808).

Almost surely, 2^725221706 is an apocalyptic number.

725221706 is a deficient number, since it is larger than the sum of its proper divisors (461504758).

725221706 is a wasteful number, since it uses less digits than its factorization.

725221706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32964636.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 725221706 is about 26929.9406980409. The cubic root of 725221706 is about 898.4424525525.

The spelling of 725221706 in words is "seven hundred twenty-five million, two hundred twenty-one thousand, seven hundred six".