55177289 has 2 divisors, whose sum is σ = 55177290. Its totient is φ = 55177288.

The previous prime is 55177277. The next prime is 55177319. The reversal of 55177289 is 98277155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51955264 + 3222025 = 7208^2 + 1795^2 .

It is a cyclic number.

It is not a de Polignac number, because 55177289 - 2⁸ = 55177033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55177229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27588644 + 27588645.

It is an arithmetic number, because the mean of its divisors is an integer number (27588645).

Almost surely, 2^55177289 is an apocalyptic number.

It is an amenable number.

55177289 is a deficient number, since it is larger than the sum of its proper divisors (1).

55177289 is an equidigital number, since it uses as much as digits as its factorization.

55177289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 44.

The square root of 55177289 is about 7428.1416922404. The cubic root of 55177289 is about 380.7034269831.

The spelling of 55177289 in words is "fifty-five million, one hundred seventy-seven thousand, two hundred eighty-nine".