31381014 has 32 divisors (see below), whose sum is σ = 75949056. Its totient is φ = 8438400.

The previous prime is 31380983. The next prime is 31381043. The reversal of 31381014 is 41018313.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21262 + ... + 22689.

It is an arithmetic number, because the mean of its divisors is an integer number (2373408).

Almost surely, 2^31381014 is an apocalyptic number.

31381014 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31381014 is an abundant number, since it is smaller than the sum of its proper divisors (44568042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31381014 is a wasteful number, since it uses less digits than its factorization.

31381014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43980.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 31381014 is about 5601.8759357915. The cubic root of 31381014 is about 315.4198282165.

Adding to 31381014 its reverse (41018313), we get a palindrome (72399327).

The spelling of 31381014 in words is "thirty-one million, three hundred eighty-one thousand, fourteen".