55181123 has 2 divisors, whose sum is σ = 55181124. Its totient is φ = 55181122.

The previous prime is 55181089. The next prime is 55181131. The reversal of 55181123 is 32118155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55181123 - 2⁶ = 55181059 is a prime.

It is a super-2 number, since 2×55181123² = 6089912671082258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55181092 and 55181101.

It is not a weakly prime, because it can be changed into another prime (55181143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27590561 + 27590562.

It is an arithmetic number, because the mean of its divisors is an integer number (27590562).

Almost surely, 2^55181123 is an apocalyptic number.

55181123 is a deficient number, since it is larger than the sum of its proper divisors (1).

55181123 is an equidigital number, since it uses as much as digits as its factorization.

55181123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 26.

The square root of 55181123 is about 7428.3997603791. The cubic root of 55181123 is about 380.7122445187.

Adding to 55181123 its reverse (32118155), we get a palindrome (87299278).

The spelling of 55181123 in words is "fifty-five million, one hundred eighty-one thousand, one hundred twenty-three".