31003220143 has 12 divisors (see below), whose sum is σ = 35969020752. Its totient is φ = 26177532480.

The previous prime is 31003220099. The next prime is 31003220167. The reversal of 31003220143 is 34102230013.

It is not a de Polignac number, because 31003220143 - 2²⁵ = 30969665711 is a prime.

It is a super-2 number, since 2×31003220143² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31003220143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31003220173) 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, 461898 + ... + 524743.

It is an arithmetic number, because the mean of its divisors is an integer number (2997418396).

Almost surely, 2^31003220143 is an apocalyptic number.

31003220143 is a deficient number, since it is larger than the sum of its proper divisors (4965800609).

31003220143 is an frugal number, since it uses more digits than its factorization.

31003220143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986782 (or 986715 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31003220143 its reverse (34102230013), we get a palindrome (65105450156).

The spelling of 31003220143 in words is "thirty-one billion, three million, two hundred twenty thousand, one hundred forty-three".