31976142 has 16 divisors (see below), whose sum is σ = 69766272. Its totient is φ = 9689720.

The previous prime is 31976137. The next prime is 31976143. The reversal of 31976142 is 24167913.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31976143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242178 + ... + 242309.

It is an arithmetic number, because the mean of its divisors is an integer number (4360392).

Almost surely, 2^31976142 is an apocalyptic number.

31976142 is an abundant number, since it is smaller than the sum of its proper divisors (37790130).

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

31976142 is a wasteful number, since it uses less digits than its factorization.

31976142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484503.

The product of its digits is 9072, while the sum is 33.

The square root of 31976142 is about 5654.7450870928. The cubic root of 31976142 is about 317.4012903307.

It can be divided in two parts, 3197 and 6142, that added together give a palindrome (9339).

The spelling of 31976142 in words is "thirty-one million, nine hundred seventy-six thousand, one hundred forty-two".