72295217 has 4 divisors (see below), whose sum is σ = 72316416. Its totient is φ = 72274020.

The previous prime is 72295213. The next prime is 72295243. The reversal of 72295217 is 71259227.

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 72295217 - 2² = 72295213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72295213) 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, 4193 + ... + 12734.

It is an arithmetic number, because the mean of its divisors is an integer number (18079104).

Almost surely, 2^72295217 is an apocalyptic number.

It is an amenable number.

72295217 is a deficient number, since it is larger than the sum of its proper divisors (21199).

72295217 is a wasteful number, since it uses less digits than its factorization.

72295217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21198.

The product of its digits is 17640, while the sum is 35.

The square root of 72295217 is about 8502.6594075030. The cubic root of 72295217 is about 416.5845782464.

The spelling of 72295217 in words is "seventy-two million, two hundred ninety-five thousand, two hundred seventeen".