91312252 has 24 divisors (see below), whose sum is σ = 168618240. Its totient is φ = 43147440.

The previous prime is 91312241. The next prime is 91312259. The reversal of 91312252 is 25221319.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91312259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36093 + ... + 38539.

It is an arithmetic number, because the mean of its divisors is an integer number (7025760).

Almost surely, 2^91312252 is an apocalyptic number.

It is an amenable number.

91312252 is a deficient number, since it is larger than the sum of its proper divisors (77305988).

91312252 is a wasteful number, since it uses less digits than its factorization.

91312252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961 (or 2959 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 91312252 is about 9555.7444503293. The cubic root of 91312252 is about 450.3080228566.

The spelling of 91312252 in words is "ninety-one million, three hundred twelve thousand, two hundred fifty-two".