2523262421 has 4 divisors (see below), whose sum is σ = 2610271500. Its totient is φ = 2436253344.

The previous prime is 2523262393. The next prime is 2523262429. The reversal of 2523262421 is 1242623252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1706103025 + 817159396 = 41305^2 + 28586^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2523262421 is a prime.

It is a super-3 number, since 3×2523262421³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 87009049 = 2523262421 / (2 + 5 + 2 + 3 + 2 + 6 + 2 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2523262429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43504496 + ... + 43504553.

It is an arithmetic number, because the mean of its divisors is an integer number (652567875).

Almost surely, 2^2523262421 is an apocalyptic number.

It is an amenable number.

2523262421 is a deficient number, since it is larger than the sum of its proper divisors (87009079).

2523262421 is an equidigital number, since it uses as much as digits as its factorization.

2523262421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87009078.

The product of its digits is 11520, while the sum is 29.

The square root of 2523262421 is about 50232.0855728687. The cubic root of 2523262421 is about 1361.4054136856.

Adding to 2523262421 its reverse (1242623252), we get a palindrome (3765885673).

The spelling of 2523262421 in words is "two billion, five hundred twenty-three million, two hundred sixty-two thousand, four hundred twenty-one".