91225525 has 24 divisors (see below), whose sum is σ = 116108640. Its totient is φ = 71079360.

The previous prime is 91225513. The next prime is 91225571. The reversal of 91225525 is 52552219.

It is not a de Polignac number, because 91225525 - 2⁷ = 91225397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178971 + ... + 179479.

It is an arithmetic number, because the mean of its divisors is an integer number (4837860).

Almost surely, 2^91225525 is an apocalyptic number.

It is an amenable number.

91225525 is a deficient number, since it is larger than the sum of its proper divisors (24883115).

91225525 is a wasteful number, since it uses less digits than its factorization.

91225525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 688 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 91225525 is about 9551.2054213068. The cubic root of 91225525 is about 450.1654124407.

The spelling of 91225525 in words is "ninety-one million, two hundred twenty-five thousand, five hundred twenty-five".