91551252 has 48 divisors (see below), whose sum is σ = 231913472. Its totient is φ = 27941760.

The previous prime is 91551227. The next prime is 91551263. The reversal of 91551252 is 25215519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17502 + ... + 22122.

Almost surely, 2^91551252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91551252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115956736).

91551252 is an abundant number, since it is smaller than the sum of its proper divisors (140362220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91551252 is a wasteful number, since it uses less digits than its factorization.

91551252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768 (or 4766 counting only the distinct ones).

The product of its digits is 4500, while the sum is 30.

The square root of 91551252 is about 9568.2418447696. The cubic root of 91551252 is about 450.7005581906.

The spelling of 91551252 in words is "ninety-one million, five hundred fifty-one thousand, two hundred fifty-two".