91533572 has 12 divisors (see below), whose sum is σ = 172505676. Its totient is φ = 42246240.

The previous prime is 91533571. The next prime is 91533577. The reversal of 91533572 is 27533519.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6635776 + 84897796 = 2576^2 + 9214^2 .

It is not an unprimeable number, because it can be changed into a prime (91533571) 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, 880079 + ... + 880182.

It is an arithmetic number, because the mean of its divisors is an integer number (14375473).

Almost surely, 2^91533572 is an apocalyptic number.

It is an amenable number.

91533572 is a deficient number, since it is larger than the sum of its proper divisors (80972104).

91533572 is a wasteful number, since it uses less digits than its factorization.

91533572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760278 (or 1760276 counting only the distinct ones).

The product of its digits is 28350, while the sum is 35.

The square root of 91533572 is about 9567.3179104700. The cubic root of 91533572 is about 450.6715438455.

The spelling of 91533572 in words is "ninety-one million, five hundred thirty-three thousand, five hundred seventy-two".