72533541 has 4 divisors (see below), whose sum is σ = 96711392. Its totient is φ = 48355692.

The previous prime is 72533497. The next prime is 72533557. The reversal of 72533541 is 14533527.

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 not a de Polignac number, because 72533541 - 2⁷ = 72533413 is a prime.

It is a super-2 number, since 2×72533541² = 10522229139997362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72533499 and 72533508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72533581) 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, 12088921 + ... + 12088926.

It is an arithmetic number, because the mean of its divisors is an integer number (24177848).

Almost surely, 2^72533541 is an apocalyptic number.

It is an amenable number.

72533541 is a deficient number, since it is larger than the sum of its proper divisors (24177851).

72533541 is a wasteful number, since it uses less digits than its factorization.

72533541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24177850.

The product of its digits is 12600, while the sum is 30.

The square root of 72533541 is about 8516.6625505535. The cubic root of 72533541 is about 417.0418385869.

The spelling of 72533541 in words is "seventy-two million, five hundred thirty-three thousand, five hundred forty-one".