725131885 has 4 divisors (see below), whose sum is σ = 870158268. Its totient is φ = 580105504.

The previous prime is 725131871. The next prime is 725131931. The reversal of 725131885 is 588131527.

725131885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588131527 = 421 ⋅1396987.

It can be written as a sum of positive squares in 2 ways, for example, as 468203044 + 256928841 = 21638^2 + 16029^2 .

It is a cyclic number.

It is not a de Polignac number, because 725131885 - 2⁵ = 725131853 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 72513184 + ... + 72513193.

It is an arithmetic number, because the mean of its divisors is an integer number (217539567).

Almost surely, 2^725131885 is an apocalyptic number.

It is an amenable number.

725131885 is a deficient number, since it is larger than the sum of its proper divisors (145026383).

725131885 is a wasteful number, since it uses less digits than its factorization.

725131885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145026382.

The product of its digits is 67200, while the sum is 40.

The square root of 725131885 is about 26928.2729672736. The cubic root of 725131885 is about 898.4053593755.

The spelling of 725131885 in words is "seven hundred twenty-five million, one hundred thirty-one thousand, eight hundred eighty-five".