31141287 has 16 divisors (see below), whose sum is σ = 48142080. Its totient is φ = 19857816.

The previous prime is 31141283. The next prime is 31141291. The reversal of 31141287 is 78214113.

It is an interprime number because it is at equal distance from previous prime (31141283) and next prime (31141291).

It is not a de Polignac number, because 31141287 - 2² = 31141283 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 31141287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31141283) 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, 24453 + ... + 25694.

It is an arithmetic number, because the mean of its divisors is an integer number (3008880).

Almost surely, 2^31141287 is an apocalyptic number.

31141287 is a deficient number, since it is larger than the sum of its proper divisors (17000793).

31141287 is a wasteful number, since it uses less digits than its factorization.

31141287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50179 (or 50173 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 31141287 is about 5580.4378860444. The cubic root of 31141287 is about 314.6145853119.

The spelling of 31141287 in words is "thirty-one million, one hundred forty-one thousand, two hundred eighty-seven".