31143469 has 12 divisors (see below), whose sum is σ = 37001664. Its totient is φ = 26124504.

The previous prime is 31143467. The next prime is 31143487. The reversal of 31143469 is 96434113.

It is not a de Polignac number, because 31143469 - 2¹ = 31143467 is a prime.

It is a super-2 number, since 2×31143469² = 1939831322707922, 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 31143469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4459 + ... + 9064.

It is an arithmetic number, because the mean of its divisors is an integer number (3083472).

Almost surely, 2^31143469 is an apocalyptic number.

It is an amenable number.

31143469 is a deficient number, since it is larger than the sum of its proper divisors (5858195).

31143469 is a wasteful number, since it uses less digits than its factorization.

31143469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584 (or 13577 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 31143469 is about 5580.6333869911. The cubic root of 31143469 is about 314.6219332526.

The spelling of 31143469 in words is "thirty-one million, one hundred forty-three thousand, four hundred sixty-nine".