72253533 has 16 divisors (see below), whose sum is σ = 105558336. Its totient is φ = 43597440.

The previous prime is 72253513. The next prime is 72253541. The reversal of 72253533 is 33535227.

It is not a de Polignac number, because 72253533 - 2¹⁴ = 72237149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72253533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72253513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2991 + ... + 12387.

It is an arithmetic number, because the mean of its divisors is an integer number (6597396).

Almost surely, 2^72253533 is an apocalyptic number.

It is an amenable number.

72253533 is a deficient number, since it is larger than the sum of its proper divisors (33304803).

72253533 is a wasteful number, since it uses less digits than its factorization.

72253533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9644.

The product of its digits is 18900, while the sum is 30.

The square root of 72253533 is about 8500.2078209888. The cubic root of 72253533 is about 416.5044980292.

The spelling of 72253533 in words is "seventy-two million, two hundred fifty-three thousand, five hundred thirty-three".