31311043242 has 8 divisors (see below), whose sum is σ = 62622086496. Its totient is φ = 10437014412.

The previous prime is 31311043213. The next prime is 31311043277. The reversal of 31311043242 is 24234011313.

It is a happy number.

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

31311043242 is an admirable number.

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, 2609253598 + ... + 2609253609.

It is an arithmetic number, because the mean of its divisors is an integer number (7827760812).

Almost surely, 2^31311043242 is an apocalyptic number.

31311043242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31311043242 is a wasteful number, since it uses less digits than its factorization.

31311043242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218507212.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31311043242 its reverse (24234011313), we get a palindrome (55545054555).

The spelling of 31311043242 in words is "thirty-one billion, three hundred eleven million, forty-three thousand, two hundred forty-two".