31540434543 has 48 divisors (see below), whose sum is σ = 50855103936. Its totient is φ = 18734284800.

The previous prime is 31540434529. The next prime is 31540434547. The reversal of 31540434543 is 34543404513.

31540434543 is a `hidden beast` number, since 31 + 5 + 40 + 43 + 4 + 543 = 666.

It is not a de Polignac number, because 31540434543 - 2⁸ = 31540434287 is a prime.

It is a super-2 number, since 2×31540434543² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31540434498 and 31540434507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540434547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 295143 + ... + 387543.

It is an arithmetic number, because the mean of its divisors is an integer number (1059481332).

Almost surely, 2^31540434543 is an apocalyptic number.

31540434543 is a deficient number, since it is larger than the sum of its proper divisors (19314669393).

31540434543 is a wasteful number, since it uses less digits than its factorization.

31540434543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92544 (or 92541 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The spelling of 31540434543 in words is "thirty-one billion, five hundred forty million, four hundred thirty-four thousand, five hundred forty-three".