2531540121 has 16 divisors (see below), whose sum is σ = 3772052928. Its totient is φ = 1496844800.

The previous prime is 2531540021. The next prime is 2531540171. The reversal of 2531540121 is 1210451352.

It is a happy number.

2531540121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2531540121 - 2¹¹ = 2531538073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2531540091 and 2531540100.

It is not an unprimeable number, because it can be changed into a prime (2531540171) 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, 934176 + ... + 936881.

It is an arithmetic number, because the mean of its divisors is an integer number (235753308).

Almost surely, 2^2531540121 is an apocalyptic number.

It is an amenable number.

2531540121 is a deficient number, since it is larger than the sum of its proper divisors (1240512807).

2531540121 is a wasteful number, since it uses less digits than its factorization.

2531540121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871112.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2531540121 is about 50314.4126568124. The cubic root of 2531540121 is about 1362.8925102738.

Adding to 2531540121 its reverse (1210451352), we get a palindrome (3741991473).

The spelling of 2531540121 in words is "two billion, five hundred thirty-one million, five hundred forty thousand, one hundred twenty-one".