31987341 has 12 divisors (see below), whose sum is σ = 46894432. Its totient is φ = 21006216.

The previous prime is 31987309. The next prime is 31987349. The reversal of 31987341 is 14378913.

It is a happy number.

It is not a de Polignac number, because 31987341 - 2⁵ = 31987309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31987296 and 31987305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31987349) 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, 25921 + ... + 27126.

Almost surely, 2^31987341 is an apocalyptic number.

It is an amenable number.

31987341 is a deficient number, since it is larger than the sum of its proper divisors (14907091).

31987341 is a wasteful number, since it uses less digits than its factorization.

31987341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53120 (or 53117 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 31987341 is about 5655.7352307193. The cubic root of 31987341 is about 317.4383404763.

The spelling of 31987341 in words is "thirty-one million, nine hundred eighty-seven thousand, three hundred forty-one".