40221497 has 4 divisors (see below), whose sum is σ = 40364916. Its totient is φ = 40078080.

The previous prime is 40221487. The next prime is 40221523. The reversal of 40221497 is 79412204.

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 9096256 + 31125241 = 3016^2 + 5579^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221497 - 2⁴ = 40221481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40221437) 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, 71288 + ... + 71849.

It is an arithmetic number, because the mean of its divisors is an integer number (10091229).

Almost surely, 2^40221497 is an apocalyptic number.

It is an amenable number.

40221497 is a deficient number, since it is larger than the sum of its proper divisors (143419).

40221497 is a wasteful number, since it uses less digits than its factorization.

40221497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143418.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 40221497 is about 6342.0420213051. The cubic root of 40221497 is about 342.6252852966.

The spelling of 40221497 in words is "forty million, two hundred twenty-one thousand, four hundred ninety-seven".