72107553 has 32 divisors (see below), whose sum is σ = 115255296. Its totient is φ = 39207168.

The previous prime is 72107513. The next prime is 72107573. The reversal of 72107553 is 35570127.

It is not a de Polignac number, because 72107553 - 2⁹ = 72107041 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72107553.

It is not an unprimeable number, because it can be changed into a prime (72107513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162550 + ... + 162992.

It is an arithmetic number, because the mean of its divisors is an integer number (3601728).

Almost surely, 2^72107553 is an apocalyptic number.

It is an amenable number.

72107553 is a deficient number, since it is larger than the sum of its proper divisors (43147743).

72107553 is a wasteful number, since it uses less digits than its factorization.

72107553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 72107553 is about 8491.6166305363. The cubic root of 72107553 is about 416.2238090096.

The spelling of 72107553 in words is "seventy-two million, one hundred seven thousand, five hundred fifty-three".