31145253543 has 20 divisors (see below), whose sum is σ = 47515538400. Its totient is φ = 20321723232.

The previous prime is 31145253521. The next prime is 31145253593. The reversal of 31145253543 is 34535254113.

31145253543 is a `hidden beast` number, since 3 + 1 + 14 + 52 + 53 + 543 = 666.

It is not a de Polignac number, because 31145253543 - 2⁹ = 31145253031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31145253498 and 31145253507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145253593) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4086718 + ... + 4094331.

It is an arithmetic number, because the mean of its divisors is an integer number (2375776920).

Almost surely, 2^31145253543 is an apocalyptic number.

31145253543 is a deficient number, since it is larger than the sum of its proper divisors (16370284857).

31145253543 is an equidigital number, since it uses as much as digits as its factorization.

31145253543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8181108 (or 8181099 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The spelling of 31145253543 in words is "thirty-one billion, one hundred forty-five million, two hundred fifty-three thousand, five hundred forty-three".