31229469 has 20 divisors (see below), whose sum is σ = 48682656. Its totient is φ = 19913256.

The previous prime is 31229461. The next prime is 31229489. The reversal of 31229469 is 96492213.

It is not a de Polignac number, because 31229469 - 2³ = 31229461 is a prime.

It is a super-2 number, since 2×31229469² = 1950559468043922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31229461) 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 19 ways as a sum of consecutive naturals, for example, 6519 + ... + 10244.

Almost surely, 2^31229469 is an apocalyptic number.

It is an amenable number.

31229469 is a deficient number, since it is larger than the sum of its proper divisors (17453187).

31229469 is a wasteful number, since it uses less digits than its factorization.

31229469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16798 (or 16789 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 31229469 is about 5588.3332935679. Note that the first 3 decimals coincide. The cubic root of 31229469 is about 314.9112675243.

The spelling of 31229469 in words is "thirty-one million, two hundred twenty-nine thousand, four hundred sixty-nine".