55172771 has 2 divisors, whose sum is σ = 55172772. Its totient is φ = 55172770.

The previous prime is 55172759. The next prime is 55172801. The reversal of 55172771 is 17727155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55172771 - 2¹⁰ = 55171747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55172071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27586385 + 27586386.

It is an arithmetic number, because the mean of its divisors is an integer number (27586386).

Almost surely, 2^55172771 is an apocalyptic number.

55172771 is a deficient number, since it is larger than the sum of its proper divisors (1).

55172771 is an equidigital number, since it uses as much as digits as its factorization.

55172771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17150, while the sum is 35.

The square root of 55172771 is about 7427.8375722683. The cubic root of 55172771 is about 380.6930358417.

The spelling of 55172771 in words is "fifty-five million, one hundred seventy-two thousand, seven hundred seventy-one".