31130213242 has 8 divisors (see below), whose sum is σ = 47576363796. Its totient is φ = 15271425312.

The previous prime is 31130213209. The next prime is 31130213249. The reversal of 31130213242 is 24231203113.

It can be written as a sum of positive squares in 2 ways, for example, as 26256637521 + 4873575721 = 162039^2 + 69811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31130213249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146840523 + ... + 146840734.

Almost surely, 2^31130213242 is an apocalyptic number.

31130213242 is a deficient number, since it is larger than the sum of its proper divisors (16446150554).

31130213242 is a wasteful number, since it uses less digits than its factorization.

31130213242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293681312.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31130213242 its reverse (24231203113), we get a palindrome (55361416355).

The spelling of 31130213242 in words is "thirty-one billion, one hundred thirty million, two hundred thirteen thousand, two hundred forty-two".