91225448 has 24 divisors (see below), whose sum is σ = 172680690. Its totient is φ = 45180000.

The previous prime is 91225447. The next prime is 91225469. The reversal of 91225448 is 84452219.

It can be written as a sum of positive squares in only one way, i.e., 90973444 + 252004 = 9538^2 + 502^2 .

It is not an unprimeable number, because it can be changed into a prime (91225447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 363323 + ... + 363573.

Almost surely, 2^91225448 is an apocalyptic number.

It is an amenable number.

91225448 is a deficient number, since it is larger than the sum of its proper divisors (81455242).

91225448 is a wasteful number, since it uses less digits than its factorization.

91225448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 434 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 91225448 is about 9551.2013904011. The cubic root of 91225448 is about 450.1652857849.

The spelling of 91225448 in words is "ninety-one million, two hundred twenty-five thousand, four hundred forty-eight".