31121469 has 16 divisors (see below), whose sum is σ = 46347840. Its totient is φ = 20638800.

The previous prime is 31121413. The next prime is 31121479. The reversal of 31121469 is 96412113.

It is not a de Polignac number, because 31121469 - 2⁷ = 31121341 is a prime.

It is a super-2 number, since 2×31121469² = 1937091665435922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2394 + ... + 8244.

It is an arithmetic number, because the mean of its divisors is an integer number (2896740).

Almost surely, 2^31121469 is an apocalyptic number.

It is an amenable number.

31121469 is a deficient number, since it is larger than the sum of its proper divisors (15226371).

31121469 is a wasteful number, since it uses less digits than its factorization.

31121469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6057 (or 6051 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 31121469 is about 5578.6619363428. The cubic root of 31121469 is about 314.5478319698.

The spelling of 31121469 in words is "thirty-one million, one hundred twenty-one thousand, four hundred sixty-nine".