108997581 has 48 divisors (see below), whose sum is σ = 187605504. Its totient is φ = 54684000.

The previous prime is 108997579. The next prime is 108997601. The reversal of 108997581 is 185799801.

It is not a de Polignac number, because 108997581 - 2¹ = 108997579 is a prime.

It is a super-2 number, since 2×108997581² = 23760945327703122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 108997581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108997501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221746 + ... + 222236.

It is an arithmetic number, because the mean of its divisors is an integer number (3908448).

Almost surely, 2^108997581 is an apocalyptic number.

108997581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

108997581 is a deficient number, since it is larger than the sum of its proper divisors (78607923).

108997581 is a wasteful number, since it uses less digits than its factorization.

108997581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 108997581 is about 10440.1906591786. The cubic root of 108997581 is about 477.6820843724.

The spelling of 108997581 in words is "one hundred eight million, nine hundred ninety-seven thousand, five hundred eighty-one".