91525213 has 8 divisors (see below), whose sum is σ = 99814400. Its totient is φ = 83414448.

The previous prime is 91525201. The next prime is 91525219. The reversal of 91525213 is 31252519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91525213 - 2⁹ = 91524701 is a prime.

It is a super-2 number, since 2×91525213² = 16753729229390738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91525219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43533 + ... + 45586.

It is an arithmetic number, because the mean of its divisors is an integer number (12476800).

Almost surely, 2^91525213 is an apocalyptic number.

It is an amenable number.

91525213 is a deficient number, since it is larger than the sum of its proper divisors (8289187).

91525213 is a wasteful number, since it uses less digits than its factorization.

91525213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89211.

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

The square root of 91525213 is about 9566.8810487013. The cubic root of 91525213 is about 450.6578247330.

It can be divided in two parts, 9152 and 5213, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 91525213 in words is "ninety-one million, five hundred twenty-five thousand, two hundred thirteen".