31020144143431 has 16 divisors (see below), whose sum is σ = 31921756876800. Its totient is φ = 30133510149600.

The previous prime is 31020144143423. The next prime is 31020144143447. The reversal of 31020144143431 is 13434144102013.

It is a cyclic number.

It is not a de Polignac number, because 31020144143431 - 2³ = 31020144143423 is a prime.

It is a super-2 number, since 2×31020144143431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020144143393 and 31020144143402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020144143411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7957651 + ... + 11196628.

It is an arithmetic number, because the mean of its divisors is an integer number (1995109804800).

Almost surely, 2^{31020144143431} is an apocalyptic number.

31020144143431 is a deficient number, since it is larger than the sum of its proper divisors (901612733369).

31020144143431 is a wasteful number, since it uses less digits than its factorization.

31020144143431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19154670.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 31020144143431 its reverse (13434144102013), we get a palindrome (44454288245444).

The spelling of 31020144143431 in words is "thirty-one trillion, twenty billion, one hundred forty-four million, one hundred forty-three thousand, four hundred thirty-one".