72249101 has 4 divisors (see below), whose sum is σ = 72573312. Its totient is φ = 71924892.

The previous prime is 72249091. The next prime is 72249119. The reversal of 72249101 is 10194227.

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 72249101 - 2²² = 68054797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72249131) 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, 161771 + ... + 162216.

It is an arithmetic number, because the mean of its divisors is an integer number (18143328).

Almost surely, 2^72249101 is an apocalyptic number.

It is an amenable number.

72249101 is a deficient number, since it is larger than the sum of its proper divisors (324211).

72249101 is a wasteful number, since it uses less digits than its factorization.

72249101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324210.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 72249101 is about 8499.9471174826. The cubic root of 72249101 is about 416.4959817873.

The spelling of 72249101 in words is "seventy-two million, two hundred forty-nine thousand, one hundred one".