531135121 has 16 divisors (see below), whose sum is σ = 599616000. Its totient is φ = 466099200.

The previous prime is 531135107. The next prime is 531135127. The reversal of 531135121 is 121531135.

It is a cyclic number.

It is not a de Polignac number, because 531135121 - 2⁷ = 531134993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531135092 and 531135101.

It is not an unprimeable number, because it can be changed into a prime (531135127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151375 + ... + 154843.

It is an arithmetic number, because the mean of its divisors is an integer number (37476000).

Almost surely, 2^531135121 is an apocalyptic number.

It is an amenable number.

531135121 is a deficient number, since it is larger than the sum of its proper divisors (68480879).

531135121 is a wasteful number, since it uses less digits than its factorization.

531135121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960.

The product of its digits is 450, while the sum is 22.

The square root of 531135121 is about 23046.3689330879. The cubic root of 531135121 is about 809.8445675440.

Adding to 531135121 its reverse (121531135), we get a palindrome (652666256).

The spelling of 531135121 in words is "five hundred thirty-one million, one hundred thirty-five thousand, one hundred twenty-one".