31143022021 has 8 divisors (see below), whose sum is σ = 31252766400. Its totient is φ = 31033393248.

The previous prime is 31143021979. The next prime is 31143022033. The reversal of 31143022021 is 12022034113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31143022021 - 2²⁵ = 31109467589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31143022021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143022121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529705 + ... + 585553.

It is an arithmetic number, because the mean of its divisors is an integer number (3906595800).

Almost surely, 2^31143022021 is an apocalyptic number.

It is an amenable number.

31143022021 is a deficient number, since it is larger than the sum of its proper divisors (109744379).

31143022021 is a wasteful number, since it uses less digits than its factorization.

31143022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57803.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31143022021 its reverse (12022034113), we get a palindrome (43165056134).

The spelling of 31143022021 in words is "thirty-one billion, one hundred forty-three million, twenty-two thousand, twenty-one".