86523531 has 4 divisors (see below), whose sum is σ = 115364712. Its totient is φ = 57682352.

The previous prime is 86523509. The next prime is 86523589. The reversal of 86523531 is 13532568.

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 86523531 - 2⁶ = 86523467 is a prime.

It is a super-2 number, since 2×86523531² = 14972642833415922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86523492 and 86523501.

It is not an unprimeable number, because it can be changed into a prime (86523431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14420586 + ... + 14420591.

It is an arithmetic number, because the mean of its divisors is an integer number (28841178).

Almost surely, 2^86523531 is an apocalyptic number.

86523531 is a deficient number, since it is larger than the sum of its proper divisors (28841181).

86523531 is a wasteful number, since it uses less digits than its factorization.

86523531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28841180.

The product of its digits is 21600, while the sum is 33.

The square root of 86523531 is about 9301.8025672447. The cubic root of 86523531 is about 442.2943702891.

The spelling of 86523531 in words is "eighty-six million, five hundred twenty-three thousand, five hundred thirty-one".