2581242337 has 4 divisors (see below), whose sum is σ = 2583699376. Its totient is φ = 2578785300.

The previous prime is 2581242331. The next prime is 2581242343. The reversal of 2581242337 is 7332421852.

2581242337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (2581242331) and next prime (2581242343).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2581242337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2581242296 and 2581242305.

It is not an unprimeable number, because it can be changed into a prime (2581242331) 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, 1226943 + ... + 1229044.

It is an arithmetic number, because the mean of its divisors is an integer number (645924844).

Almost surely, 2^2581242337 is an apocalyptic number.

It is an amenable number.

2581242337 is a deficient number, since it is larger than the sum of its proper divisors (2457039).

2581242337 is a wasteful number, since it uses less digits than its factorization.

2581242337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457038.

The product of its digits is 80640, while the sum is 37.

The square root of 2581242337 is about 50805.9281678821. The cubic root of 2581242337 is about 1371.7540778234.

The spelling of 2581242337 in words is "two billion, five hundred eighty-one million, two hundred forty-two thousand, three hundred thirty-seven".