40220069 has 2 divisors, whose sum is σ = 40220070. Its totient is φ = 40220068.

The previous prime is 40220053. The next prime is 40220083. The reversal of 40220069 is 96002204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40157569 + 62500 = 6337^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 40220069 - 2⁴ = 40220053 is a prime.

It is a super-2 number, since 2×40220069² = 3235307900729522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40220039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110034 + 20110035.

It is an arithmetic number, because the mean of its divisors is an integer number (20110035).

Almost surely, 2^40220069 is an apocalyptic number.

It is an amenable number.

40220069 is a deficient number, since it is larger than the sum of its proper divisors (1).

40220069 is an equidigital number, since it uses as much as digits as its factorization.

40220069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40220069 is about 6341.9294382703. The cubic root of 40220069 is about 342.6212304608.

The spelling of 40220069 in words is "forty million, two hundred twenty thousand, sixty-nine".