31130345242 has 8 divisors (see below), whose sum is σ = 47131924896. Its totient is φ = 15419703612.

The previous prime is 31130345227. The next prime is 31130345263. The reversal of 31130345242 is 24254303113.

It is a happy number.

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

It is a super-2 number, since 2×31130345242² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31130345242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72734238 + ... + 72734665.

It is an arithmetic number, because the mean of its divisors is an integer number (5891490612).

Almost surely, 2^31130345242 is an apocalyptic number.

31130345242 is a deficient number, since it is larger than the sum of its proper divisors (16001579654).

31130345242 is a wasteful number, since it uses less digits than its factorization.

31130345242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145469012.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 31130345242 its reverse (24254303113), we get a palindrome (55384648355).

The spelling of 31130345242 in words is "thirty-one billion, one hundred thirty million, three hundred forty-five thousand, two hundred forty-two".