72331263 has 24 divisors (see below), whose sum is σ = 108636528. Its totient is φ = 46334592.

The previous prime is 72331229. The next prime is 72331267. The reversal of 72331263 is 36213327.

72331263 is a `hidden beast` number, since 72 + 331 + 263 = 666.

It is not a de Polignac number, because 72331263 - 2⁹ = 72330751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72331267) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26331 + ... + 28947.

It is an arithmetic number, because the mean of its divisors is an integer number (4526522).

Almost surely, 2^72331263 is an apocalyptic number.

72331263 is a deficient number, since it is larger than the sum of its proper divisors (36305265).

72331263 is a wasteful number, since it uses less digits than its factorization.

72331263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743 (or 2740 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 72331263 is about 8504.7788331032. The cubic root of 72331263 is about 416.6538023406.

The spelling of 72331263 in words is "seventy-two million, three hundred thirty-one thousand, two hundred sixty-three".