40972221 has 6 divisors (see below), whose sum is σ = 59182110. Its totient is φ = 27314808.

The previous prime is 40972213. The next prime is 40972231. The reversal of 40972221 is 12227904.

It can be written as a sum of positive squares in only one way, i.e., 30802500 + 10169721 = 5550^2 + 3189^2 .

It is not a de Polignac number, because 40972221 - 2³ = 40972213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40972231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2276226 + ... + 2276243.

It is an arithmetic number, because the mean of its divisors is an integer number (9863685).

Almost surely, 2^40972221 is an apocalyptic number.

It is an amenable number.

40972221 is a deficient number, since it is larger than the sum of its proper divisors (18209889).

40972221 is a wasteful number, since it uses less digits than its factorization.

40972221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552475 (or 4552472 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 40972221 is about 6400.9546944186. The cubic root of 40972221 is about 344.7438299991.

The spelling of 40972221 in words is "forty million, nine hundred seventy-two thousand, two hundred twenty-one".