31042942 has 16 divisors (see below), whose sum is σ = 53425152. Its totient is φ = 13251960.

The previous prime is 31042937. The next prime is 31042943. The reversal of 31042942 is 24924013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042943) 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, 534 + ... + 7897.

It is an arithmetic number, because the mean of its divisors is an integer number (3339072).

Almost surely, 2^31042942 is an apocalyptic number.

31042942 is a deficient number, since it is larger than the sum of its proper divisors (22382210).

31042942 is a wasteful number, since it uses less digits than its factorization.

31042942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8703.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 31042942 is about 5571.6193337305. The cubic root of 31042942 is about 314.2830490329.

Adding to 31042942 its reverse (24924013), we get a palindrome (55966955).

The spelling of 31042942 in words is "thirty-one million, forty-two thousand, nine hundred forty-two".