2543232521 has 16 divisors (see below), whose sum is σ = 2813543424. Its totient is φ = 2286603264.

The previous prime is 2543232509. The next prime is 2543232539. The reversal of 2543232521 is 1252323452.

It is a cyclic number.

It is not a de Polignac number, because 2543232521 - 2¹⁸ = 2542970377 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543232541) 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, 333665 + ... + 341201.

It is an arithmetic number, because the mean of its divisors is an integer number (175846464).

Almost surely, 2^2543232521 is an apocalyptic number.

It is an amenable number.

2543232521 is a deficient number, since it is larger than the sum of its proper divisors (270310903).

2543232521 is a wasteful number, since it uses less digits than its factorization.

2543232521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8440.

The product of its digits is 14400, while the sum is 29.

The square root of 2543232521 is about 50430.4721473040. The cubic root of 2543232521 is about 1364.9875476419.

Adding to 2543232521 its reverse (1252323452), we get a palindrome (3795555973).

The spelling of 2543232521 in words is "two billion, five hundred forty-three million, two hundred thirty-two thousand, five hundred twenty-one".