55571123 has 2 divisors, whose sum is σ = 55571124. Its totient is φ = 55571122.

The previous prime is 55571119. The next prime is 55571129. The reversal of 55571123 is 32117555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55571123 - 2² = 55571119 is a prime.

It is a super-2 number, since 2×55571123² = 6176299422962258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55571129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27785561 + 27785562.

It is an arithmetic number, because the mean of its divisors is an integer number (27785562).

Almost surely, 2^55571123 is an apocalyptic number.

55571123 is a deficient number, since it is larger than the sum of its proper divisors (1).

55571123 is an equidigital number, since it uses as much as digits as its factorization.

55571123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5250, while the sum is 29.

The square root of 55571123 is about 7454.6041477734. The cubic root of 55571123 is about 381.6070514067.

Adding to 55571123 its reverse (32117555), we get a palindrome (87688678).

The spelling of 55571123 in words is "fifty-five million, five hundred seventy-one thousand, one hundred twenty-three".