31354656220543 has 4 divisors (see below), whose sum is σ = 31357673713008. Its totient is φ = 31351638728080.

The previous prime is 31354656220507. The next prime is 31354656220549. The reversal of 31354656220543 is 34502265645313.

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 31354656220543 - 2³³ = 31346066285951 is a prime.

It is a super-2 number, since 2×31354656220543² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31354656220549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508730646 + ... + 1508751427.

It is an arithmetic number, because the mean of its divisors is an integer number (7839418428252).

Almost surely, 2^{31354656220543} is an apocalyptic number.

31354656220543 is a deficient number, since it is larger than the sum of its proper divisors (3017492465).

31354656220543 is a wasteful number, since it uses less digits than its factorization.

31354656220543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017492464.

The product of its (nonzero) digits is 7776000, while the sum is 49.

The spelling of 31354656220543 in words is "thirty-one trillion, three hundred fifty-four billion, six hundred fifty-six million, two hundred twenty thousand, five hundred forty-three".