871249231 has 4 divisors (see below), whose sum is σ = 871584264. Its totient is φ = 870914200.

The previous prime is 871249219. The next prime is 871249241. The reversal of 871249231 is 132942178.

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

It is a cyclic number.

It is not a de Polignac number, because 871249231 - 2⁷ = 871249103 is a prime.

It is a super-2 number, since 2×871249231² = 1518150445036182722, 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 (871249241) 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, 163585 + ... + 168826.

It is an arithmetic number, because the mean of its divisors is an integer number (217896066).

Almost surely, 2^871249231 is an apocalyptic number.

871249231 is a deficient number, since it is larger than the sum of its proper divisors (335033).

871249231 is a wasteful number, since it uses less digits than its factorization.

871249231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335032.

The product of its digits is 24192, while the sum is 37.

The square root of 871249231 is about 29516.9312598719. The cubic root of 871249231 is about 955.0969743361.

The spelling of 871249231 in words is "eight hundred seventy-one million, two hundred forty-nine thousand, two hundred thirty-one".