31442269 has 2 divisors, whose sum is σ = 31442270. Its totient is φ = 31442268.

The previous prime is 31442263. The next prime is 31442273. The reversal of 31442269 is 96224413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31416025 + 26244 = 5605^2 + 162^2 .

It is a cyclic number.

It is not a de Polignac number, because 31442269 - 2³ = 31442261 is a prime.

It is a super-2 number, since 2×31442269² = 1977232559736722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31442269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31442261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721134 + 15721135.

It is an arithmetic number, because the mean of its divisors is an integer number (15721135).

Almost surely, 2^31442269 is an apocalyptic number.

It is an amenable number.

31442269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31442269 is an equidigital number, since it uses as much as digits as its factorization.

31442269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 31442269 is about 5607.3406352744. The cubic root of 31442269 is about 315.6249255171.

The spelling of 31442269 in words is "thirty-one million, four hundred forty-two thousand, two hundred sixty-nine".