86013531 has 24 divisors (see below), whose sum is σ = 127908144. Its totient is φ = 55664640.

The previous prime is 86013511. The next prime is 86013533. The reversal of 86013531 is 13531068.

86013531 is a `hidden beast` number, since 8 + 601 + 3 + 53 + 1 = 666.

It is not a de Polignac number, because 86013531 - 2²¹ = 83916379 is a prime.

It is a super-2 number, since 2×86013531² = 14796655030175922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86013495 and 86013504.

It is not an unprimeable number, because it can be changed into a prime (86013533) 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 23 ways as a sum of consecutive naturals, for example, 94380 + ... + 95286.

It is an arithmetic number, because the mean of its divisors is an integer number (5329506).

Almost surely, 2^86013531 is an apocalyptic number.

86013531 is a deficient number, since it is larger than the sum of its proper divisors (41894613).

86013531 is a wasteful number, since it uses less digits than its factorization.

86013531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 86013531 is about 9274.3480094290. The cubic root of 86013531 is about 441.4236446043.

Adding to 86013531 its reverse (13531068), we get a palindrome (99544599).

It can be divided in two parts, 86013 and 531, that multiplied together give a triangular number (45672903 = T₉₅₅₇).

The spelling of 86013531 in words is "eighty-six million, thirteen thousand, five hundred thirty-one".