91225005 has 16 divisors (see below), whose sum is σ = 147013440. Its totient is φ = 48302208.

The previous prime is 91224997. The next prime is 91225019. The reversal of 91225005 is 50052219.

It is not a de Polignac number, because 91225005 - 2³ = 91224997 is a prime.

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, 19792 + ... + 23961.

It is an arithmetic number, because the mean of its divisors is an integer number (9188340).

Almost surely, 2^91225005 is an apocalyptic number.

It is an amenable number.

91225005 is a deficient number, since it is larger than the sum of its proper divisors (55788435).

91225005 is a wasteful number, since it uses less digits than its factorization.

91225005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43900.

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

The square root of 91225005 is about 9551.1781995731. The cubic root of 91225005 is about 450.1645571010.

The spelling of 91225005 in words is "ninety-one million, two hundred twenty-five thousand, five".