1555051123 has 2 divisors, whose sum is σ = 1555051124. Its totient is φ = 1555051122.

The previous prime is 1555051063. The next prime is 1555051187. The reversal of 1555051123 is 3211505551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1555051123 - 2¹⁷ = 1554920051 is a prime.

It is a super-2 number, since 2×1555051123² = 4836367990287122258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1555051091 and 1555051100.

It is not a weakly prime, because it can be changed into another prime (1555051423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777525561 + 777525562.

It is an arithmetic number, because the mean of its divisors is an integer number (777525562).

Almost surely, 2^1555051123 is an apocalyptic number.

1555051123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555051123 is an equidigital number, since it uses as much as digits as its factorization.

1555051123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 1555051123 is about 39434.1365190110. The cubic root of 1555051123 is about 1158.5502903976.

Adding to 1555051123 its reverse (3211505551), we get a palindrome (4766556674).

The spelling of 1555051123 in words is "one billion, five hundred fifty-five million, fifty-one thousand, one hundred twenty-three".