87481231 has 2 divisors, whose sum is σ = 87481232. Its totient is φ = 87481230.

The previous prime is 87481223. The next prime is 87481267. The reversal of 87481231 is 13218478.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87481231 - 2³ = 87481223 is a prime.

It is a super-2 number, since 2×87481231² = 15305931554550722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87481211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43740615 + 43740616.

It is an arithmetic number, because the mean of its divisors is an integer number (43740616).

Almost surely, 2^87481231 is an apocalyptic number.

87481231 is a deficient number, since it is larger than the sum of its proper divisors (1).

87481231 is an equidigital number, since it uses as much as digits as its factorization.

87481231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 87481231 is about 9353.1401678794. The cubic root of 87481231 is about 443.9202556105.

The spelling of 87481231 in words is "eighty-seven million, four hundred eighty-one thousand, two hundred thirty-one".