2521542423 has 4 divisors (see below), whose sum is σ = 3362056568. Its totient is φ = 1681028280.

The previous prime is 2521542409. The next prime is 2521542437. The reversal of 2521542423 is 3242451252.

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

It is an interprime number because it is at equal distance from previous prime (2521542409) and next prime (2521542437).

It is not a de Polignac number, because 2521542423 - 2¹⁶ = 2521476887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521542473) 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, 420257068 + ... + 420257073.

It is an arithmetic number, because the mean of its divisors is an integer number (840514142).

Almost surely, 2^2521542423 is an apocalyptic number.

2521542423 is a deficient number, since it is larger than the sum of its proper divisors (840514145).

2521542423 is an equidigital number, since it uses as much as digits as its factorization.

2521542423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840514144.

The product of its digits is 19200, while the sum is 30.

The square root of 2521542423 is about 50214.9621427717. The cubic root of 2521542423 is about 1361.0960064634.

Adding to 2521542423 its reverse (3242451252), we get a palindrome (5763993675).

The spelling of 2521542423 in words is "two billion, five hundred twenty-one million, five hundred forty-two thousand, four hundred twenty-three".