40187442221 has 4 divisors (see below), whose sum is σ = 40189307232. Its totient is φ = 40185577212.

The previous prime is 40187442209. The next prime is 40187442271. The reversal of 40187442221 is 12224478104.

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 40187442221 - 2³⁴ = 23007573037 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 (40187442271) 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, 899801 + ... + 943406.

It is an arithmetic number, because the mean of its divisors is an integer number (10047326808).

Almost surely, 2^40187442221 is an apocalyptic number.

It is an amenable number.

40187442221 is a deficient number, since it is larger than the sum of its proper divisors (1865011).

40187442221 is a wasteful number, since it uses less digits than its factorization.

40187442221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865010.

The product of its (nonzero) digits is 28672, while the sum is 35.

The spelling of 40187442221 in words is "forty billion, one hundred eighty-seven million, four hundred forty-two thousand, two hundred twenty-one".