72100163 has 4 divisors (see below), whose sum is σ = 72814128. Its totient is φ = 71386200.

The previous prime is 72100153. The next prime is 72100187. The reversal of 72100163 is 36100127.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72100163 - 2²⁰ = 71051587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72100123) 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, 356831 + ... + 357032.

It is an arithmetic number, because the mean of its divisors is an integer number (18203532).

Almost surely, 2^72100163 is an apocalyptic number.

72100163 is a deficient number, since it is larger than the sum of its proper divisors (713965).

72100163 is a wasteful number, since it uses less digits than its factorization.

72100163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713964.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 72100163 is about 8491.1814843401. The cubic root of 72100163 is about 416.2095895143.

The spelling of 72100163 in words is "seventy-two million, one hundred thousand, one hundred sixty-three".