31142331402 has 32 divisors (see below), whose sum is σ = 76658047872. Its totient is φ = 8213361984.

The previous prime is 31142331379. The next prime is 31142331449. The reversal of 31142331402 is 20413324113.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28518073 + ... + 28519164.

It is an arithmetic number, because the mean of its divisors is an integer number (2395563996).

Almost surely, 2^31142331402 is an apocalyptic number.

31142331402 is an abundant number, since it is smaller than the sum of its proper divisors (45515716470).

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

31142331402 is a wasteful number, since it uses less digits than its factorization.

31142331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57037262.

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

Adding to 31142331402 its reverse (20413324113), we get a palindrome (51555655515).

The spelling of 31142331402 in words is "thirty-one billion, one hundred forty-two million, three hundred thirty-one thousand, four hundred two".