2542021523 has 4 divisors (see below), whose sum is σ = 2542641600. Its totient is φ = 2541401448.

The previous prime is 2542021511. The next prime is 2542021541. The reversal of 2542021523 is 3251202452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2542021523 - 2¹² = 2542017427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2542021492 and 2542021501.

It is not an unprimeable number, because it can be changed into a prime (2542021553) 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, 303848 + ... + 312101.

It is an arithmetic number, because the mean of its divisors is an integer number (635660400).

Almost surely, 2^2542021523 is an apocalyptic number.

2542021523 is a deficient number, since it is larger than the sum of its proper divisors (620077).

2542021523 is an equidigital number, since it uses as much as digits as its factorization.

2542021523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620076.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2542021523 is about 50418.4641079040. The cubic root of 2542021523 is about 1364.7708602028.

Adding to 2542021523 its reverse (3251202452), we get a palindrome (5793223975).

The spelling of 2542021523 in words is "two billion, five hundred forty-two million, twenty-one thousand, five hundred twenty-three".