31124142 has 32 divisors (see below), whose sum is σ = 79046400. Its totient is φ = 8892504.

The previous prime is 31124123. The next prime is 31124143. The reversal of 31124142 is 24142113.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31124143) 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, 40792 + ... + 41547.

It is an arithmetic number, because the mean of its divisors is an integer number (2470200).

Almost surely, 2^31124142 is an apocalyptic number.

31124142 is an abundant number, since it is smaller than the sum of its proper divisors (47922258).

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

31124142 is a wasteful number, since it uses less digits than its factorization.

31124142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82357 (or 82351 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 31124142 is about 5578.9015047767. The cubic root of 31124142 is about 314.5568371390.

Adding to 31124142 its reverse (24142113), we get a palindrome (55266255).

The spelling of 31124142 in words is "thirty-one million, one hundred twenty-four thousand, one hundred forty-two".