31143342430223 has 4 divisors (see below), whose sum is σ = 31143564094440. Its totient is φ = 31143120766008.

The previous prime is 31143342430177. The next prime is 31143342430229. The reversal of 31143342430223 is 32203424334113.

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

It is a cyclic number.

It is not a de Polignac number, because 31143342430223 - 2²⁴ = 31143325653007 is a prime.

It is a super-2 number, since 2×31143342430223² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143342430229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110621228 + ... + 110902401.

It is an arithmetic number, because the mean of its divisors is an integer number (7785891023610).

Almost surely, 2^{31143342430223} is an apocalyptic number.

31143342430223 is a deficient number, since it is larger than the sum of its proper divisors (221664217).

31143342430223 is a wasteful number, since it uses less digits than its factorization.

31143342430223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221664216.

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 31143342430223 its reverse (32203424334113), we get a palindrome (63346766764336).

The spelling of 31143342430223 in words is "thirty-one trillion, one hundred forty-three billion, three hundred forty-two million, four hundred thirty thousand, two hundred twenty-three".