86215501 has 4 divisors (see below), whose sum is σ = 86236672. Its totient is φ = 86194332.

The previous prime is 86215499. The next prime is 86215511. The reversal of 86215501 is 10551268.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86215501 - 2¹ = 86215499 is a prime.

It is a super-2 number, since 2×86215501² = 14866225225362002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86215501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86215511) 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, 2331 + ... + 13336.

It is an arithmetic number, because the mean of its divisors is an integer number (21559168).

Almost surely, 2^86215501 is an apocalyptic number.

It is an amenable number.

86215501 is a deficient number, since it is larger than the sum of its proper divisors (21171).

86215501 is a wasteful number, since it uses less digits than its factorization.

86215501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21170.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 86215501 is about 9285.2302610113. The cubic root of 86215501 is about 441.7688795989.

Adding to 86215501 its reverse (10551268), we get a palindrome (96766769).

The spelling of 86215501 in words is "eighty-six million, two hundred fifteen thousand, five hundred one".