40555851 has 16 divisors (see below), whose sum is σ = 62150400. Its totient is φ = 23043168.

The previous prime is 40555849. The next prime is 40555873. The reversal of 40555851 is 15855504.

It is not a de Polignac number, because 40555851 - 2¹ = 40555849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40555841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1636 + ... + 9153.

It is an arithmetic number, because the mean of its divisors is an integer number (3884400).

Almost surely, 2^40555851 is an apocalyptic number.

40555851 is a deficient number, since it is larger than the sum of its proper divisors (21594549).

40555851 is a wasteful number, since it uses less digits than its factorization.

40555851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10978.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 40555851 is about 6368.3475878755. The cubic root of 40555851 is about 343.5720605902.

The spelling of 40555851 in words is "forty million, five hundred fifty-five thousand, eight hundred fifty-one".