72265991 has 8 divisors (see below), whose sum is σ = 85254144. Its totient is φ = 59943960.

The previous prime is 72265951. The next prime is 72266003. The reversal of 72265991 is 19956227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72265991 - 2⁶ = 72265927 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 (72265951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166295 + ... + 166728.

It is an arithmetic number, because the mean of its divisors is an integer number (10656768).

Almost surely, 2^72265991 is an apocalyptic number.

72265991 is a deficient number, since it is larger than the sum of its proper divisors (12988153).

72265991 is a wasteful number, since it uses less digits than its factorization.

72265991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333061.

The product of its digits is 68040, while the sum is 41.

The square root of 72265991 is about 8500.9405950165. The cubic root of 72265991 is about 416.5284346434.

The spelling of 72265991 in words is "seventy-two million, two hundred sixty-five thousand, nine hundred ninety-one".