31484871 has 24 divisors (see below), whose sum is σ = 51217920. Its totient is φ = 18464400.

The previous prime is 31484863. The next prime is 31484903. The reversal of 31484871 is 17848413.

It is not a de Polignac number, because 31484871 - 2³ = 31484863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31484801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2061 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (2134080).

Almost surely, 2^31484871 is an apocalyptic number.

31484871 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31484871 is a deficient number, since it is larger than the sum of its proper divisors (19733049).

31484871 is a wasteful number, since it uses less digits than its factorization.

31484871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10307 (or 10304 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 31484871 is about 5611.1381198470. The cubic root of 31484871 is about 315.7674108314.

The spelling of 31484871 in words is "thirty-one million, four hundred eighty-four thousand, eight hundred seventy-one".