31700142 has 24 divisors (see below), whose sum is σ = 68796000. Its totient is φ = 10549440.

The previous prime is 31700129. The next prime is 31700167. The reversal of 31700142 is 24100713.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14859 + ... + 16857.

It is an arithmetic number, because the mean of its divisors is an integer number (2866500).

Almost surely, 2^31700142 is an apocalyptic number.

31700142 is an abundant number, since it is smaller than the sum of its proper divisors (37095858).

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

31700142 is a wasteful number, since it uses less digits than its factorization.

31700142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888 (or 2885 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 31700142 is about 5630.2879144854. The cubic root of 31700142 is about 316.4854406576.

Adding to 31700142 its reverse (24100713), we get a palindrome (55800855).

The spelling of 31700142 in words is "thirty-one million, seven hundred thousand, one hundred forty-two".