31345142 has 16 divisors (see below), whose sum is σ = 48437232. Its totient is φ = 15202080.

The previous prime is 31345141. The next prime is 31345157. The reversal of 31345142 is 24154313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31345141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45017 + ... + 45707.

It is an arithmetic number, because the mean of its divisors is an integer number (3027327).

Almost surely, 2^31345142 is an apocalyptic number.

31345142 is a deficient number, since it is larger than the sum of its proper divisors (17092090).

31345142 is a wasteful number, since it uses less digits than its factorization.

31345142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its digits is 1440, while the sum is 23.

The square root of 31345142 is about 5598.6732356872. The cubic root of 31345142 is about 315.2995957074.

Adding to 31345142 its reverse (24154313), we get a palindrome (55499455).

The spelling of 31345142 in words is "thirty-one million, three hundred forty-five thousand, one hundred forty-two".