72113505 has 16 divisors (see below), whose sum is σ = 115516800. Its totient is φ = 38415488.

The previous prime is 72113501. The next prime is 72113539. The reversal of 72113505 is 50531127.

It is a cyclic number.

It is not a de Polignac number, because 72113505 - 2² = 72113501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72113501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13444 + ... + 18026.

It is an arithmetic number, because the mean of its divisors is an integer number (7219800).

Almost surely, 2^72113505 is an apocalyptic number.

It is an amenable number.

72113505 is a deficient number, since it is larger than the sum of its proper divisors (43403295).

72113505 is a wasteful number, since it uses less digits than its factorization.

72113505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5640.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 72113505 is about 8491.9670866060. The cubic root of 72113505 is about 416.2352608656.

The spelling of 72113505 in words is "seventy-two million, one hundred thirteen thousand, five hundred five".