72525813 has 4 divisors (see below), whose sum is σ = 96701088. Its totient is φ = 48350540.

The previous prime is 72525811. The next prime is 72525823. The reversal of 72525813 is 31852527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72525813 - 2¹ = 72525811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72525811) 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, 12087633 + ... + 12087638.

It is an arithmetic number, because the mean of its divisors is an integer number (24175272).

Almost surely, 2^72525813 is an apocalyptic number.

It is an amenable number.

72525813 is a deficient number, since it is larger than the sum of its proper divisors (24175275).

72525813 is a wasteful number, since it uses less digits than its factorization.

72525813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24175274.

The product of its digits is 16800, while the sum is 33.

The square root of 72525813 is about 8516.2088396187. The cubic root of 72525813 is about 417.0270269850.

The spelling of 72525813 in words is "seventy-two million, five hundred twenty-five thousand, eight hundred thirteen".