55815127 has 2 divisors, whose sum is σ = 55815128. Its totient is φ = 55815126.

The previous prime is 55815101. The next prime is 55815139. The reversal of 55815127 is 72151855.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55815127 is a prime.

It is a super-2 number, since 2×55815127² = 6230656804052258, which contains 22 as substring.

It is equal to p_3327973 and since 55815127 and 3327973 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 55815092 and 55815101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55815157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27907563 + 27907564.

It is an arithmetic number, because the mean of its divisors is an integer number (27907564).

Almost surely, 2^55815127 is an apocalyptic number.

55815127 is a deficient number, since it is larger than the sum of its proper divisors (1).

55815127 is an equidigital number, since it uses as much as digits as its factorization.

55815127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14000, while the sum is 34.

The square root of 55815127 is about 7470.9522150794. The cubic root of 55815127 is about 382.1647613047.

The spelling of 55815127 in words is "fifty-five million, eight hundred fifteen thousand, one hundred twenty-seven".