40955021 has 4 divisors (see below), whose sum is σ = 41184000. Its totient is φ = 40726044.

The previous prime is 40955017. The next prime is 40955029. The reversal of 40955021 is 12055904.

40955021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40955021 - 2² = 40955017 is a prime.

It is a super-2 number, since 2×40955021² = 3354627490220882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40955029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114221 + ... + 114578.

It is an arithmetic number, because the mean of its divisors is an integer number (10296000).

Almost surely, 2^40955021 is an apocalyptic number.

It is an amenable number.

40955021 is a deficient number, since it is larger than the sum of its proper divisors (228979).

40955021 is a wasteful number, since it uses less digits than its factorization.

40955021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228978.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 40955021 is about 6399.6110038033. The cubic root of 40955021 is about 344.6955824819.

The spelling of 40955021 in words is "forty million, nine hundred fifty-five thousand, twenty-one".