31202142 has 32 divisors (see below), whose sum is σ = 66078720. Its totient is φ = 9794880.

The previous prime is 31202141. The next prime is 31202147. The reversal of 31202142 is 24120213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31202141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21058 + ... + 22490.

It is an arithmetic number, because the mean of its divisors is an integer number (2064960).

Almost surely, 2^31202142 is an apocalyptic number.

31202142 is an abundant number, since it is smaller than the sum of its proper divisors (34876578).

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

31202142 is a wasteful number, since it uses less digits than its factorization.

31202142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 31202142 is about 5585.8877539743. The cubic root of 31202142 is about 314.8193875172.

Adding to 31202142 its reverse (24120213), we get a palindrome (55322355).

The spelling of 31202142 in words is "thirty-one million, two hundred two thousand, one hundred forty-two".