31133245442 has 16 divisors (see below), whose sum is σ = 51651415032. Its totient is φ = 13980833280.

The previous prime is 31133245427. The next prime is 31133245459. The reversal of 31133245442 is 24454233113.

It can be written as a sum of positive squares in 4 ways, for example, as 27403822681 + 3729422761 = 165541^2 + 61069^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31133245399 and 31133245408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16180559 + ... + 16182482.

Almost surely, 2^31133245442 is an apocalyptic number.

31133245442 is a deficient number, since it is larger than the sum of its proper divisors (20518169590).

31133245442 is a wasteful number, since it uses less digits than its factorization.

31133245442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32363093.

The product of its digits is 34560, while the sum is 32.

Adding to 31133245442 its reverse (24454233113), we get a palindrome (55587478555).

The spelling of 31133245442 in words is "thirty-one billion, one hundred thirty-three million, two hundred forty-five thousand, four hundred forty-two".