91563424 has 24 divisors (see below), whose sum is σ = 180629568. Its totient is φ = 45689280.

The previous prime is 91563421. The next prime is 91563443. The reversal of 91563424 is 42436519.

It is a happy number.

It is a super-2 number, since 2×91563424² = 16767721229207552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91563424.

It is not an unprimeable number, because it can be changed into a prime (91563421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14889 + ... + 20119.

It is an arithmetic number, because the mean of its divisors is an integer number (7526232).

Almost surely, 2^91563424 is an apocalyptic number.

It is an amenable number.

91563424 is a deficient number, since it is larger than the sum of its proper divisors (89066144).

91563424 is a wasteful number, since it uses less digits than its factorization.

91563424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788 (or 5780 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 91563424 is about 9568.8778861474. The cubic root of 91563424 is about 450.7205312802.

The spelling of 91563424 in words is "ninety-one million, five hundred sixty-three thousand, four hundred twenty-four".