31021300143 has 12 divisors (see below), whose sum is σ = 45093951448. Its totient is φ = 20549140560.

The previous prime is 31021300139. The next prime is 31021300159. The reversal of 31021300143 is 34100312013.

31021300143 is a `hidden beast` number, since 310 + 213 + 0 + 0 + 143 = 666.

It is not a de Polignac number, because 31021300143 - 2² = 31021300139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021300183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10975693 + ... + 10978518.

Almost surely, 2^31021300143 is an apocalyptic number.

31021300143 is a deficient number, since it is larger than the sum of its proper divisors (14072651305).

31021300143 is a wasteful number, since it uses less digits than its factorization.

31021300143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21954374 (or 21954371 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31021300143 its reverse (34100312013), we get a palindrome (65121612156).

The spelling of 31021300143 in words is "thirty-one billion, twenty-one million, three hundred thousand, one hundred forty-three".