40550021311 has 4 divisors (see below), whose sum is σ = 41063312800. Its totient is φ = 40036729824.

The previous prime is 40550021299. The next prime is 40550021321. The reversal of 40550021311 is 11312005504.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40550021311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40550021321) 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, 256645626 + ... + 256645783.

It is an arithmetic number, because the mean of its divisors is an integer number (10265828200).

Almost surely, 2^40550021311 is an apocalyptic number.

40550021311 is a deficient number, since it is larger than the sum of its proper divisors (513291489).

40550021311 is an equidigital number, since it uses as much as digits as its factorization.

40550021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513291488.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 40550021311 its reverse (11312005504), we get a palindrome (51862026815).

The spelling of 40550021311 in words is "forty billion, five hundred fifty million, twenty-one thousand, three hundred eleven".