31031012142 has 32 divisors (see below), whose sum is σ = 74262252960. Its totient is φ = 9548003520.

The previous prime is 31031012141. The next prime is 31031012179. The reversal of 31031012142 is 24121013013.

31031012142 is a `hidden beast` number, since 310 + 310 + 1 + 2 + 1 + 42 = 666.

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 (31031012141) 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, 22101159 + ... + 22102562.

It is an arithmetic number, because the mean of its divisors is an integer number (2320695405).

Almost surely, 2^31031012142 is an apocalyptic number.

31031012142 is an abundant number, since it is smaller than the sum of its proper divisors (43231240818).

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

31031012142 is a wasteful number, since it uses less digits than its factorization.

31031012142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44203745 (or 44203739 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31031012142 its reverse (24121013013), we get a palindrome (55152025155).

The spelling of 31031012142 in words is "thirty-one billion, thirty-one million, twelve thousand, one hundred forty-two".