8225981 has 4 divisors (see below), whose sum is σ = 8232000. Its totient is φ = 8219964.

The previous prime is 8225963. The next prime is 8225983. The reversal of 8225981 is 1895228.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8225981 is a prime.

It is a super-2 number, since 2×8225981² = 135333526824722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8225983) 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, 140 + ... + 4058.

It is an arithmetic number, because the mean of its divisors is an integer number (2058000).

Almost surely, 2^8225981 is an apocalyptic number.

It is an amenable number.

8225981 is a deficient number, since it is larger than the sum of its proper divisors (6019).

8225981 is a wasteful number, since it uses less digits than its factorization.

8225981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6018.

The product of its digits is 11520, while the sum is 35.

The square root of 8225981 is about 2868.0971043533. The cubic root of 8225981 is about 201.8657163920.

The spelling of 8225981 in words is "eight million, two hundred twenty-five thousand, nine hundred eighty-one".