55571122726831 has 2 divisors, whose sum is σ = 55571122726832. Its totient is φ = 55571122726830.

The previous prime is 55571122726741. The next prime is 55571122726841. The reversal of 55571122726831 is 13862722117555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55571122726831 - 2⁹ = 55571122726319 is a prime.

It is a super-2 number, since 2×55571122726831² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55571122726841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27785561363415 + 27785561363416.

It is an arithmetic number, because the mean of its divisors is an integer number (27785561363416).

Almost surely, 2^{55571122726831} is an apocalyptic number.

55571122726831 is a deficient number, since it is larger than the sum of its proper divisors (1).

55571122726831 is an equidigital number, since it uses as much as digits as its factorization.

55571122726831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056000, while the sum is 55.

The spelling of 55571122726831 in words is "fifty-five trillion, five hundred seventy-one billion, one hundred twenty-two million, seven hundred twenty-six thousand, eight hundred thirty-one".