91052250 has 32 divisors (see below), whose sum is σ = 227268288. Its totient is φ = 24280400.

The previous prime is 91052249. The next prime is 91052293. The reversal of 91052250 is 5225019.

It is a self number, because there is not a number n which added to its sum of digits gives 91052250.

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, 59952 + ... + 61451.

It is an arithmetic number, because the mean of its divisors is an integer number (7102134).

Almost surely, 2^91052250 is an apocalyptic number.

91052250 is an abundant number, since it is smaller than the sum of its proper divisors (136216038).

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

91052250 is a wasteful number, since it uses less digits than its factorization.

91052250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121423 (or 121413 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 91052250 is about 9542.1302653024. The cubic root of 91052250 is about 449.8802150310.

Adding to 91052250 its reverse (5225019), we get a palindrome (96277269).

The spelling of 91052250 in words is "ninety-one million, fifty-two thousand, two hundred fifty".