40881555 has 48 divisors (see below), whose sum is σ = 83262816. Its totient is φ = 18293760.

The previous prime is 40881517. The next prime is 40881571. The reversal of 40881555 is 55518804.

It is not a de Polignac number, because 40881555 - 2⁸ = 40881299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3259 + ... + 9611.

It is an arithmetic number, because the mean of its divisors is an integer number (1734642).

Almost surely, 2^40881555 is an apocalyptic number.

40881555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40881555 is an abundant number, since it is smaller than the sum of its proper divisors (42381261).

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

40881555 is a wasteful number, since it uses less digits than its factorization.

40881555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 40881555 is about 6393.8685472881. The cubic root of 40881555 is about 344.4893516622.

The spelling of 40881555 in words is "forty million, eight hundred eighty-one thousand, five hundred fifty-five".