40221197 has 4 divisors (see below), whose sum is σ = 40246140. Its totient is φ = 40196256.

The previous prime is 40221169. The next prime is 40221199. The reversal of 40221197 is 79112204.

40221197 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 24068836 + 16152361 = 4906^2 + 4019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221197 is a prime.

It is a super-2 number, since 2×40221197² = 3235489376225618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9872 + ... + 13337.

It is an arithmetic number, because the mean of its divisors is an integer number (10061535).

Almost surely, 2^40221197 is an apocalyptic number.

It is an amenable number.

40221197 is a deficient number, since it is larger than the sum of its proper divisors (24943).

40221197 is a wasteful number, since it uses less digits than its factorization.

40221197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24942.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 40221197 is about 6342.0183695729. The cubic root of 40221197 is about 342.6244334483.

The spelling of 40221197 in words is "forty million, two hundred twenty-one thousand, one hundred ninety-seven".