55164257 has 2 divisors, whose sum is σ = 55164258. Its totient is φ = 55164256.

The previous prime is 55164217. The next prime is 55164271. The reversal of 55164257 is 75246155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39450961 + 15713296 = 6281^2 + 3964^2 .

It is a cyclic number.

It is not a de Polignac number, because 55164257 - 2²⁰ = 54115681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55164217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27582128 + 27582129.

It is an arithmetic number, because the mean of its divisors is an integer number (27582129).

Almost surely, 2^55164257 is an apocalyptic number.

It is an amenable number.

55164257 is a deficient number, since it is larger than the sum of its proper divisors (1).

55164257 is an equidigital number, since it uses as much as digits as its factorization.

55164257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 35.

The square root of 55164257 is about 7427.2644358472. The cubic root of 55164257 is about 380.6734525873.

The spelling of 55164257 in words is "fifty-five million, one hundred sixty-four thousand, two hundred fifty-seven".