55133123 has 2 divisors, whose sum is σ = 55133124. Its totient is φ = 55133122.

The previous prime is 55133107. The next prime is 55133131. The reversal of 55133123 is 32133155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55133123 - 2⁴ = 55133107 is a prime.

It is a super-2 number, since 2×55133123² = 6079322503466258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55133153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27566561 + 27566562.

It is an arithmetic number, because the mean of its divisors is an integer number (27566562).

Almost surely, 2^55133123 is an apocalyptic number.

55133123 is a deficient number, since it is larger than the sum of its proper divisors (1).

55133123 is an equidigital number, since it uses as much as digits as its factorization.

55133123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 23.

The square root of 55133123 is about 7425.1682135828. The cubic root of 55133123 is about 380.6018233700.

Adding to 55133123 its reverse (32133155), we get a palindrome (87266278).

The spelling of 55133123 in words is "fifty-five million, one hundred thirty-three thousand, one hundred twenty-three".