31542322543 has 4 divisors (see below), whose sum is σ = 31557126328. Its totient is φ = 31527518760.

The previous prime is 31542322517. The next prime is 31542322607. The reversal of 31542322543 is 34522324513.

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 31542322543 - 2¹³ = 31542314351 is a prime.

It is a super-2 number, since 2×31542322543² (a number of 22 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 = 31542322499 and 31542322508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31542322943) 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, 7398696 + ... + 7402957.

It is an arithmetic number, because the mean of its divisors is an integer number (7889281582).

Almost surely, 2^31542322543 is an apocalyptic number.

31542322543 is a deficient number, since it is larger than the sum of its proper divisors (14803785).

31542322543 is a wasteful number, since it uses less digits than its factorization.

31542322543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14803784.

The product of its digits is 86400, while the sum is 34.

The spelling of 31542322543 in words is "thirty-one billion, five hundred forty-two million, three hundred twenty-two thousand, five hundred forty-three".