725535251 has 4 divisors (see below), whose sum is σ = 829183152. Its totient is φ = 621887352.

The previous prime is 725535229. The next prime is 725535263. The reversal of 725535251 is 152535527.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725535251 - 2¹⁴ = 725518867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (725535451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51823940 + ... + 51823953.

It is an arithmetic number, because the mean of its divisors is an integer number (207295788).

Almost surely, 2^725535251 is an apocalyptic number.

725535251 is a deficient number, since it is larger than the sum of its proper divisors (103647901).

725535251 is a wasteful number, since it uses less digits than its factorization.

725535251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103647900.

The product of its digits is 52500, while the sum is 35.

The square root of 725535251 is about 26935.7615633937. The cubic root of 725535251 is about 898.5719125272.

The spelling of 725535251 in words is "seven hundred twenty-five million, five hundred thirty-five thousand, two hundred fifty-one".