31143112202 has 4 divisors (see below), whose sum is σ = 46714668306. Its totient is φ = 15571556100.

The previous prime is 31143112199. The next prime is 31143112207. The reversal of 31143112202 is 20221134113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23121939481 + 8021172721 = 152059^2 + 89561^2 .

It is a super-2 number, since 2×31143112202² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31143112207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7785778049 + ... + 7785778052.

Almost surely, 2^31143112202 is an apocalyptic number.

31143112202 is a deficient number, since it is larger than the sum of its proper divisors (15571556104).

31143112202 is a wasteful number, since it uses less digits than its factorization.

31143112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571556103.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31143112202 its reverse (20221134113), we get a palindrome (51364246315).

The spelling of 31143112202 in words is "thirty-one billion, one hundred forty-three million, one hundred twelve thousand, two hundred two".