72555533 has 4 divisors (see below), whose sum is σ = 72753600. Its totient is φ = 72357468.

The previous prime is 72555521. The next prime is 72555563. The reversal of 72555533 is 33555527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72555533 - 2⁴ = 72555517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72555493 and 72555502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72555563) 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 3 ways as a sum of consecutive naturals, for example, 98483 + ... + 99216.

It is an arithmetic number, because the mean of its divisors is an integer number (18188400).

Almost surely, 2^72555533 is an apocalyptic number.

It is an amenable number.

72555533 is a deficient number, since it is larger than the sum of its proper divisors (198067).

72555533 is a wasteful number, since it uses less digits than its factorization.

72555533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198066.

The product of its digits is 78750, while the sum is 35.

The square root of 72555533 is about 8517.9535687863. The cubic root of 72555533 is about 417.0839830312.

The spelling of 72555533 in words is "seventy-two million, five hundred fifty-five thousand, five hundred thirty-three".