72333553 has 8 divisors (see below), whose sum is σ = 74210976. Its totient is φ = 70461600.

The previous prime is 72333539. The next prime is 72333577. The reversal of 72333553 is 35533327.

It is a happy number.

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 72333553 - 2²⁵ = 38779121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72333523) 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, 45258 + ... + 46828.

It is an arithmetic number, because the mean of its divisors is an integer number (9276372).

Almost surely, 2^72333553 is an apocalyptic number.

It is an amenable number.

72333553 is a deficient number, since it is larger than the sum of its proper divisors (1877423).

72333553 is a wasteful number, since it uses less digits than its factorization.

72333553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its digits is 28350, while the sum is 31.

The square root of 72333553 is about 8504.9134622288. The cubic root of 72333553 is about 416.6581993657.

The spelling of 72333553 in words is "seventy-two million, three hundred thirty-three thousand, five hundred fifty-three".