55172027 has 2 divisors, whose sum is σ = 55172028. Its totient is φ = 55172026.

The previous prime is 55172003. The next prime is 55172063. The reversal of 55172027 is 72027155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55172027 - 2²² = 50977723 is a prime.

It is not a weakly prime, because it can be changed into another prime (55172087) 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, 27586013 + 27586014.

It is an arithmetic number, because the mean of its divisors is an integer number (27586014).

Almost surely, 2^55172027 is an apocalyptic number.

55172027 is a deficient number, since it is larger than the sum of its proper divisors (1).

55172027 is an equidigital number, since it uses as much as digits as its factorization.

55172027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 55172027 is about 7427.7874902288. The cubic root of 55172027 is about 380.6913246299.

The spelling of 55172027 in words is "fifty-five million, one hundred seventy-two thousand, twenty-seven".