31214140 has 12 divisors (see below), whose sum is σ = 65549736. Its totient is φ = 12485648.

The previous prime is 31214123. The next prime is 31214149. The reversal of 31214140 is 4141213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31214149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 780334 + ... + 780373.

It is an arithmetic number, because the mean of its divisors is an integer number (5462478).

Almost surely, 2^31214140 is an apocalyptic number.

It is an amenable number.

31214140 is an abundant number, since it is smaller than the sum of its proper divisors (34335596).

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

31214140 is a wasteful number, since it uses less digits than its factorization.

31214140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560716 (or 1560714 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 31214140 is about 5586.9616071708. The cubic root of 31214140 is about 314.8597343089.

Adding to 31214140 its reverse (4141213), we get a palindrome (35355353).

The spelling of 31214140 in words is "thirty-one million, two hundred fourteen thousand, one hundred forty".