6825087281 has 4 divisors (see below), whose sum is σ = 6970301952. Its totient is φ = 6679872612.

The previous prime is 6825087179. The next prime is 6825087287. The reversal of 6825087281 is 1827805286.

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 6825087281 - 2²⁶ = 6757978417 is a prime.

It is a super-2 number, since 2×6825087281² = 93163632786535945922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 145214623 = 6825087281 / (6 + 8 + 2 + 5 + 0 + 8 + 7 + 2 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6825087287) 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, 72607265 + ... + 72607358.

It is an arithmetic number, because the mean of its divisors is an integer number (1742575488).

Almost surely, 2^6825087281 is an apocalyptic number.

It is an amenable number.

6825087281 is a deficient number, since it is larger than the sum of its proper divisors (145214671).

6825087281 is a wasteful number, since it uses less digits than its factorization.

6825087281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145214670.

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 6825087281 is about 82614.0864562455. The cubic root of 6825087281 is about 1896.8634566763.

The spelling of 6825087281 in words is "six billion, eight hundred twenty-five million, eighty-seven thousand, two hundred eighty-one".