55102129 has 2 divisors, whose sum is σ = 55102130. Its totient is φ = 55102128.

The previous prime is 55102121. The next prime is 55102193. The reversal of 55102129 is 92120155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46991025 + 8111104 = 6855^2 + 2848^2 .

It is a cyclic number.

It is not a de Polignac number, because 55102129 - 2³ = 55102121 is a prime.

It is not a weakly prime, because it can be changed into another prime (55102121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27551064 + 27551065.

It is an arithmetic number, because the mean of its divisors is an integer number (27551065).

Almost surely, 2^55102129 is an apocalyptic number.

It is an amenable number.

55102129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55102129 is an equidigital number, since it uses as much as digits as its factorization.

55102129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 55102129 is about 7423.0808294131. The cubic root of 55102129 is about 380.5304894575.

The spelling of 55102129 in words is "fifty-five million, one hundred two thousand, one hundred twenty-nine".