55622869 has 2 divisors, whose sum is σ = 55622870. Its totient is φ = 55622868.

The previous prime is 55622867. The next prime is 55622909. The reversal of 55622869 is 96822655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46991025 + 8631844 = 6855^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 55622869 - 2¹ = 55622867 is a prime.

It is a super-2 number, since 2×55622869² = 6187807111582322, which contains 22 as substring.

Together with 55622867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55622863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27811434 + 27811435.

It is an arithmetic number, because the mean of its divisors is an integer number (27811435).

Almost surely, 2^55622869 is an apocalyptic number.

It is an amenable number.

55622869 is a deficient number, since it is larger than the sum of its proper divisors (1).

55622869 is an equidigital number, since it uses as much as digits as its factorization.

55622869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 43.

The square root of 55622869 is about 7458.0740811553. The cubic root of 55622869 is about 381.7254613017.

The spelling of 55622869 in words is "fifty-five million, six hundred twenty-two thousand, eight hundred sixty-nine".