72275591 has 8 divisors (see below), whose sum is σ = 76088160. Its totient is φ = 68518912.

The previous prime is 72275587. The next prime is 72275629. The reversal of 72275591 is 19557227.

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 72275591 - 2² = 72275587 is a prime.

It is a super-2 number, since 2×72275591² = 10447522108798562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72275191) 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, 11306 + ... + 16503.

It is an arithmetic number, because the mean of its divisors is an integer number (9511020).

Almost surely, 2^72275591 is an apocalyptic number.

72275591 is a deficient number, since it is larger than the sum of its proper divisors (3812569).

72275591 is a wasteful number, since it uses less digits than its factorization.

72275591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27945.

The product of its digits is 44100, while the sum is 38.

The square root of 72275591 is about 8501.5052196655. The cubic root of 72275591 is about 416.5468780627.

The spelling of 72275591 in words is "seventy-two million, two hundred seventy-five thousand, five hundred ninety-one".