3131245042 has 4 divisors (see below), whose sum is σ = 4696867566. Its totient is φ = 1565622520.

The previous prime is 3131245021. The next prime is 3131245057. The reversal of 3131245042 is 2405421313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2635692921 + 495552121 = 51339^2 + 22261^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3131244998 and 3131245016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 782811259 + ... + 782811262.

Almost surely, 2^3131245042 is an apocalyptic number.

3131245042 is a deficient number, since it is larger than the sum of its proper divisors (1565622524).

3131245042 is a wasteful number, since it uses less digits than its factorization.

3131245042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565622523.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 3131245042 is about 55957.5289125601. The cubic root of 3131245042 is about 1462.9821204657.

Adding to 3131245042 its reverse (2405421313), we get a palindrome (5536666355).

The spelling of 3131245042 in words is "three billion, one hundred thirty-one million, two hundred forty-five thousand, forty-two".