31143122402 has 16 divisors (see below), whose sum is σ = 53397695232. Its totient is φ = 13344681120.

The previous prime is 31143122383. The next prime is 31143122431. The reversal of 31143122402 is 20422134113.

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, 114803 + ... + 274710.

It is an arithmetic number, because the mean of its divisors is an integer number (3337355952).

Almost surely, 2^31143122402 is an apocalyptic number.

31143122402 is a deficient number, since it is larger than the sum of its proper divisors (22254572830).

31143122402 is a wasteful number, since it uses less digits than its factorization.

31143122402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395233.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31143122402 its reverse (20422134113), we get a palindrome (51565256515).

The spelling of 31143122402 in words is "thirty-one billion, one hundred forty-three million, one hundred twenty-two thousand, four hundred two".