31240469 has 16 divisors (see below), whose sum is σ = 34933248. Its totient is φ = 27749952.

The previous prime is 31240439. The next prime is 31240481. The reversal of 31240469 is 96404213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31240469 is a prime.

It is a super-2 number, since 2×31240469² = 1951933806679922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240439) 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 15 ways as a sum of consecutive naturals, for example, 51164 + ... + 51770.

It is an arithmetic number, because the mean of its divisors is an integer number (2183328).

Almost surely, 2^31240469 is an apocalyptic number.

It is an amenable number.

31240469 is a deficient number, since it is larger than the sum of its proper divisors (3692779).

31240469 is a wasteful number, since it uses less digits than its factorization.

31240469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 31240469 is about 5589.3174001840. The cubic root of 31240469 is about 314.9482370643.

The spelling of 31240469 in words is "thirty-one million, two hundred forty thousand, four hundred sixty-nine".