91541320 has 32 divisors (see below), whose sum is σ = 221812920. Its totient is φ = 33799680.

The previous prime is 91541309. The next prime is 91541323. The reversal of 91541320 is 2314519.

It can be written as a sum of positive squares in 4 ways, for example, as 52678564 + 38862756 = 7258^2 + 6234^2 .

It is not an unprimeable number, because it can be changed into a prime (91541323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87501 + ... + 88540.

Almost surely, 2^91541320 is an apocalyptic number.

It is an amenable number.

91541320 is an abundant number, since it is smaller than the sum of its proper divisors (130271600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91541320 is a wasteful number, since it uses less digits than its factorization.

91541320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176065 (or 176061 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 91541320 is about 9567.7228220721. The cubic root of 91541320 is about 450.6842594154.

Adding to 91541320 its reverse (2314519), we get a palindrome (93855839).

The spelling of 91541320 in words is "ninety-one million, five hundred forty-one thousand, three hundred twenty".