91135225 has 6 divisors (see below), whose sum is σ = 113007710. Its totient is φ = 72908160.

The previous prime is 91135201. The next prime is 91135243. The reversal of 91135225 is 52253119.

It can be written as a sum of positive squares in 3 ways, for example, as 27071209 + 64064016 = 5203^2 + 8004^2 .

It is not a de Polignac number, because 91135225 - 2⁷ = 91135097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91135193 and 91135202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1822680 + ... + 1822729.

Almost surely, 2^91135225 is an apocalyptic number.

It is an amenable number.

91135225 is a deficient number, since it is larger than the sum of its proper divisors (21872485).

91135225 is a wasteful number, since it uses less digits than its factorization.

91135225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645419 (or 3645414 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 91135225 is about 9546.4770989093. The cubic root of 91135225 is about 450.0168306462.

The spelling of 91135225 in words is "ninety-one million, one hundred thirty-five thousand, two hundred twenty-five".