7881231 has 8 divisors (see below), whose sum is σ = 10571904. Its totient is φ = 5222360.

The previous prime is 7881229. The next prime is 7881241. The reversal of 7881231 is 1321887.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7881231 - 2¹ = 7881229 is a prime.

It is a super-2 number, since 2×7881231² = 124227604150722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7881221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7365 + ... + 8366.

It is an arithmetic number, because the mean of its divisors is an integer number (1321488).

Almost surely, 2^7881231 is an apocalyptic number.

7881231 is a deficient number, since it is larger than the sum of its proper divisors (2690673).

7881231 is a wasteful number, since it uses less digits than its factorization.

7881231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15901.

The product of its digits is 2688, while the sum is 30.

The square root of 7881231 is about 2807.3530237574. The cubic root of 7881231 is about 199.0053195888.

The spelling of 7881231 in words is "seven million, eight hundred eighty-one thousand, two hundred thirty-one".