31514140 has 48 divisors (see below), whose sum is σ = 78930432. Its totient is φ = 10334016.

The previous prime is 31514113. The next prime is 31514143. The reversal of 31514140 is 4141513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31514143) 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 15 ways as a sum of consecutive naturals, for example, 1674 + ... + 8113.

It is an arithmetic number, because the mean of its divisors is an integer number (1644384).

Almost surely, 2^31514140 is an apocalyptic number.

It is an amenable number.

31514140 is an abundant number, since it is smaller than the sum of its proper divisors (47416292).

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

31514140 is a wasteful number, since it uses less digits than its factorization.

31514140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9826 (or 9824 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 31514140 is about 5613.7456301475. The cubic root of 31514140 is about 315.8652285411.

Adding to 31514140 its reverse (4141513), we get a palindrome (35655653).

The spelling of 31514140 in words is "thirty-one million, five hundred fourteen thousand, one hundred forty".