86021511 has 16 divisors (see below), whose sum is σ = 119028960. Its totient is φ = 55193600.

The previous prime is 86021489. The next prime is 86021527. The reversal of 86021511 is 11512068.

It is a cyclic number.

It is not a de Polignac number, because 86021511 - 2¹⁸ = 85759367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86021561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29311 + ... + 32111.

It is an arithmetic number, because the mean of its divisors is an integer number (7439310).

Almost surely, 2^86021511 is an apocalyptic number.

86021511 is a deficient number, since it is larger than the sum of its proper divisors (33007449).

86021511 is a wasteful number, since it uses less digits than its factorization.

86021511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 86021511 is about 9274.7782183727. The cubic root of 86021511 is about 441.4372953703.

Adding to 86021511 its reverse (11512068), we get a palindrome (97533579).

The spelling of 86021511 in words is "eighty-six million, twenty-one thousand, five hundred eleven".