91825131 has 16 divisors (see below), whose sum is σ = 131880960. Its totient is φ = 56664960.

The previous prime is 91825121. The next prime is 91825159. The reversal of 91825131 is 13152819.

It is not a de Polignac number, because 91825131 - 2⁵ = 91825099 is a prime.

It is a super-2 number, since 2×91825131² = 16863709366334322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91825121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19326 + ... + 23603.

It is an arithmetic number, because the mean of its divisors is an integer number (8242560).

Almost surely, 2^91825131 is an apocalyptic number.

91825131 is a deficient number, since it is larger than the sum of its proper divisors (40055829).

91825131 is a wasteful number, since it uses less digits than its factorization.

91825131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42986.

The product of its digits is 2160, while the sum is 30.

The square root of 91825131 is about 9582.5430340803. The cubic root of 91825131 is about 451.1495399737.

The spelling of 91825131 in words is "ninety-one million, eight hundred twenty-five thousand, one hundred thirty-one".