91252560 has 160 divisors (see below), whose sum is σ = 334621440. Its totient is φ = 20127744.

The previous prime is 91252559. The next prime is 91252597. The reversal of 91252560 is 6525219.

It is a happy number.

It is a super-3 number, since 3×91252560³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47784 + ... + 49656.

It is an arithmetic number, because the mean of its divisors is an integer number (2091384).

Almost surely, 2^91252560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91252560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167310720).

91252560 is an abundant number, since it is smaller than the sum of its proper divisors (243368880).

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

91252560 is a wasteful number, since it uses less digits than its factorization.

91252560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 91252560 is about 9552.6205828558. The cubic root of 91252560 is about 450.2098774078.

Adding to 91252560 its reverse (6525219), we get a palindrome (97777779).

The spelling of 91252560 in words is "ninety-one million, two hundred fifty-two thousand, five hundred sixty".