91252224 has 320 divisors, whose sum is σ = 329978880. Its totient is φ = 24330240.

The previous prime is 91252223. The next prime is 91252261. The reversal of 91252224 is 42225219.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91252223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2225644 + ... + 2225684.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^91252224 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 91252224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164989440).

91252224 is an abundant number, since it is smaller than the sum of its proper divisors (238726656).

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

91252224 is a wasteful number, since it uses less digits than its factorization.

91252224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 76 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 91252224 is about 9552.6029960425. The cubic root of 91252224 is about 450.2093248363.

The spelling of 91252224 in words is "ninety-one million, two hundred fifty-two thousand, two hundred twenty-four".