55622129 has 2 divisors, whose sum is σ = 55622130. Its totient is φ = 55622128.

The previous prime is 55622123. The next prime is 55622141. The reversal of 55622129 is 92122655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41731600 + 13890529 = 6460^2 + 3727^2 .

It is a cyclic number.

It is not a de Polignac number, because 55622129 - 2¹⁶ = 55556593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55622095 and 55622104.

It is not a weakly prime, because it can be changed into another prime (55622123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27811064 + 27811065.

It is an arithmetic number, because the mean of its divisors is an integer number (27811065).

Almost surely, 2^55622129 is an apocalyptic number.

It is an amenable number.

55622129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55622129 is an equidigital number, since it uses as much as digits as its factorization.

55622129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 55622129 is about 7458.0244703272. The cubic root of 55622129 is about 381.7237684842.

The spelling of 55622129 in words is "fifty-five million, six hundred twenty-two thousand, one hundred twenty-nine".