40973966221 has 4 divisors (see below), whose sum is σ = 40977905500. Its totient is φ = 40970026944.

The previous prime is 40973966179. The next prime is 40973966237. The reversal of 40973966221 is 12266937904.

40973966221 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.

It can be written as a sum of positive squares in 2 ways, for example, as 40244372100 + 729594121 = 200610^2 + 27011^2 .

It is a cyclic number.

It is not a de Polignac number, because 40973966221 - 2²³ = 40965577613 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 (40973966261) 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, 1953996 + ... + 1974853.

It is an arithmetic number, because the mean of its divisors is an integer number (10244476375).

Almost surely, 2^40973966221 is an apocalyptic number.

It is an amenable number.

40973966221 is a deficient number, since it is larger than the sum of its proper divisors (3939279).

40973966221 is a wasteful number, since it uses less digits than its factorization.

40973966221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939278.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 40973966221 in words is "forty billion, nine hundred seventy-three million, nine hundred sixty-six thousand, two hundred twenty-one".