55211729 has 2 divisors, whose sum is σ = 55211730. Its totient is φ = 55211728.

The previous prime is 55211693. The next prime is 55211731. The reversal of 55211729 is 92711255.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49561600 + 5650129 = 7040^2 + 2377^2 .

It is a cyclic number.

It is not a de Polignac number, because 55211729 - 2¹⁶ = 55146193 is a prime.

Together with 55211731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55211695 and 55211704.

It is not a weakly prime, because it can be changed into another prime (55211029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27605864 + 27605865.

It is an arithmetic number, because the mean of its divisors is an integer number (27605865).

Almost surely, 2^55211729 is an apocalyptic number.

It is an amenable number.

55211729 is a deficient number, since it is larger than the sum of its proper divisors (1).

55211729 is an equidigital number, since it uses as much as digits as its factorization.

55211729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 32.

The square root of 55211729 is about 7430.4595416434. The cubic root of 55211729 is about 380.7826183756.

The spelling of 55211729 in words is "fifty-five million, two hundred eleven thousand, seven hundred twenty-nine".