2542336521 has 4 divisors (see below), whose sum is σ = 3389782032. Its totient is φ = 1694891012.

The previous prime is 2542336499. The next prime is 2542336523. The reversal of 2542336521 is 1256332452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2542336521 - 2⁶ = 2542336457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2542336523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423722751 + ... + 423722756.

It is an arithmetic number, because the mean of its divisors is an integer number (847445508).

Almost surely, 2^2542336521 is an apocalyptic number.

It is an amenable number.

2542336521 is a deficient number, since it is larger than the sum of its proper divisors (847445511).

2542336521 is an equidigital number, since it uses as much as digits as its factorization.

2542336521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847445510.

The product of its digits is 43200, while the sum is 33.

The square root of 2542336521 is about 50421.5878468737. The cubic root of 2542336521 is about 1364.8272303438.

Adding to 2542336521 its reverse (1256332452), we get a palindrome (3798668973).

The spelling of 2542336521 in words is "two billion, five hundred forty-two million, three hundred thirty-six thousand, five hundred twenty-one".