91332554225 has 12 divisors (see below), whose sum is σ = 123548037360. Its totient is φ = 66423675600.

The previous prime is 91332554219. The next prime is 91332554231. The reversal of 91332554225 is 52245523319.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (91332554219) and next prime (91332554231).

It is not a de Polignac number, because 91332554225 - 2⁶ = 91332554161 is a prime.

It is a super-2 number, since 2×91332554225² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166058915 + ... + 166059464.

It is an arithmetic number, because the mean of its divisors is an integer number (10295669780).

Almost surely, 2^91332554225 is an apocalyptic number.

It is an amenable number.

91332554225 is a deficient number, since it is larger than the sum of its proper divisors (32215483135).

91332554225 is a wasteful number, since it uses less digits than its factorization.

91332554225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332118400 (or 332118395 counting only the distinct ones).

The product of its digits is 324000, while the sum is 41.

The spelling of 91332554225 in words is "ninety-one billion, three hundred thirty-two million, five hundred fifty-four thousand, two hundred twenty-five".