40555771 has 4 divisors (see below), whose sum is σ = 40590000. Its totient is φ = 40521544.

The previous prime is 40555763. The next prime is 40555777. The reversal of 40555771 is 17755504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40555771 - 2³ = 40555763 is a prime.

It is a super-2 number, since 2×40555771² = 3289541122808882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40555777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15271 + ... + 17728.

It is an arithmetic number, because the mean of its divisors is an integer number (10147500).

Almost surely, 2^40555771 is an apocalyptic number.

40555771 is a deficient number, since it is larger than the sum of its proper divisors (34229).

40555771 is a wasteful number, since it uses less digits than its factorization.

40555771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34228.

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 40555771 is about 6368.3413068082. The cubic root of 40555771 is about 343.5718346813.

The spelling of 40555771 in words is "forty million, five hundred fifty-five thousand, seven hundred seventy-one".