31331141042 has 4 divisors (see below), whose sum is σ = 46996711566. Its totient is φ = 15665570520.

The previous prime is 31331141027. The next prime is 31331141059. The reversal of 31331141042 is 24014113313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24014113313 = 151 ⋅159033863.

It can be written as a sum of positive squares in only one way, i.e., 26257285681 + 5073855361 = 162041^2 + 71231^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31331140999 and 31331141017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7832785259 + ... + 7832785262.

Almost surely, 2^31331141042 is an apocalyptic number.

31331141042 is a deficient number, since it is larger than the sum of its proper divisors (15665570524).

31331141042 is a wasteful number, since it uses less digits than its factorization.

31331141042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15665570523.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31331141042 its reverse (24014113313), we get a palindrome (55345254355).

The spelling of 31331141042 in words is "thirty-one billion, three hundred thirty-one million, one hundred forty-one thousand, forty-two".