556135121 has 8 divisors (see below), whose sum is σ = 565936800. Its totient is φ = 546346080.

The previous prime is 556135091. The next prime is 556135141. The reversal of 556135121 is 121531655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 556135121 - 2⁶ = 556135057 is a prime.

It is a super-3 number, since 3×556135121³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556135141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146870 + ... + 150608.

It is an arithmetic number, because the mean of its divisors is an integer number (70742100).

Almost surely, 2^556135121 is an apocalyptic number.

It is an amenable number.

556135121 is a deficient number, since it is larger than the sum of its proper divisors (9801679).

556135121 is a wasteful number, since it uses less digits than its factorization.

556135121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6319.

The product of its digits is 4500, while the sum is 29.

The square root of 556135121 is about 23582.5172744557. The cubic root of 556135121 is about 822.3564583535.

Adding to 556135121 its reverse (121531655), we get a palindrome (677666776).

The spelling of 556135121 in words is "five hundred fifty-six million, one hundred thirty-five thousand, one hundred twenty-one".