725448131 has 4 divisors (see below), whose sum is σ = 725503272. Its totient is φ = 725392992.

The previous prime is 725448127. The next prime is 725448197. The reversal of 725448131 is 131844527.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 725448131 - 2² = 725448127 is a prime.

It is a super-2 number, since 2×725448131² = 1052549981542786322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725448091 and 725448100.

It is not an unprimeable number, because it can be changed into a prime (725448121) 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, 4955 + ... + 38411.

It is an arithmetic number, because the mean of its divisors is an integer number (181375818).

Almost surely, 2^725448131 is an apocalyptic number.

725448131 is a deficient number, since it is larger than the sum of its proper divisors (55141).

725448131 is a wasteful number, since it uses less digits than its factorization.

725448131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55140.

The product of its digits is 26880, while the sum is 35.

The square root of 725448131 is about 26934.1443339119. The cubic root of 725448131 is about 898.5359451875.

The spelling of 725448131 in words is "seven hundred twenty-five million, four hundred forty-eight thousand, one hundred thirty-one".