55431030311543 has 4 divisors (see below), whose sum is σ = 55523569594800. Its totient is φ = 55338491028288.

The previous prime is 55431030311533. The next prime is 55431030311551. The reversal of 55431030311543 is 34511303013455.

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 55431030311543 - 2³² = 55426735344247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55431030311497 and 55431030311506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55431030311513) 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, 46269640730 + ... + 46269641927.

It is an arithmetic number, because the mean of its divisors is an integer number (13880892398700).

Almost surely, 2^{55431030311543} is an apocalyptic number.

55431030311543 is a deficient number, since it is larger than the sum of its proper divisors (92539283257).

55431030311543 is an equidigital number, since it uses as much as digits as its factorization.

55431030311543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92539283256.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 55431030311543 its reverse (34511303013455), we get a palindrome (89942333324998).

The spelling of 55431030311543 in words is "fifty-five trillion, four hundred thirty-one billion, thirty million, three hundred eleven thousand, five hundred forty-three".