72737255 has 4 divisors (see below), whose sum is σ = 87284712. Its totient is φ = 58189800.

The previous prime is 72737243. The next prime is 72737257. The reversal of 72737255 is 55273727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55273727 = 67 ⋅824981.

It is not a de Polignac number, because 72737255 - 2²² = 68542951 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 (72737257) 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, 7273721 + ... + 7273730.

It is an arithmetic number, because the mean of its divisors is an integer number (21821178).

Almost surely, 2^72737255 is an apocalyptic number.

72737255 is a deficient number, since it is larger than the sum of its proper divisors (14547457).

72737255 is a wasteful number, since it uses less digits than its factorization.

72737255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14547456.

The product of its digits is 102900, while the sum is 38.

The square root of 72737255 is about 8528.6138967595. The cubic root of 72737255 is about 417.4319011164.

The spelling of 72737255 in words is "seventy-two million, seven hundred thirty-seven thousand, two hundred fifty-five".