91241553 has 32 divisors (see below), whose sum is σ = 140313600. Its totient is φ = 52266816.

The previous prime is 91241551. The next prime is 91241561. The reversal of 91241553 is 35514219.

It is not a de Polignac number, because 91241553 - 2¹ = 91241551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91241553.

It is not an unprimeable number, because it can be changed into a prime (91241551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42676 + ... + 44762.

It is an arithmetic number, because the mean of its divisors is an integer number (4384800).

Almost surely, 2^91241553 is an apocalyptic number.

It is an amenable number.

91241553 is a deficient number, since it is larger than the sum of its proper divisors (49072047).

91241553 is a wasteful number, since it uses less digits than its factorization.

91241553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181.

The product of its digits is 5400, while the sum is 30.

The square root of 91241553 is about 9552.0444408514. The cubic root of 91241553 is about 450.1917750504.

It can be divided in two parts, 912 and 41553, that multiplied together give a square (37896336 = 6156²).

The spelling of 91241553 in words is "ninety-one million, two hundred forty-one thousand, five hundred fifty-three".