55431320471 has 2 divisors, whose sum is σ = 55431320472. Its totient is φ = 55431320470.

The previous prime is 55431320401. The next prime is 55431320491. The reversal of 55431320471 is 17402313455.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55431320471 is a prime.

It is a super-3 number, since 3×55431320471³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55431320401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27715660235 + 27715660236.

It is an arithmetic number, because the mean of its divisors is an integer number (27715660236).

Almost surely, 2^55431320471 is an apocalyptic number.

55431320471 is a deficient number, since it is larger than the sum of its proper divisors (1).

55431320471 is an equidigital number, since it uses as much as digits as its factorization.

55431320471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 55431320471 in words is "fifty-five billion, four hundred thirty-one million, three hundred twenty thousand, four hundred seventy-one".