86221487 has 16 divisors (see below), whose sum is σ = 100648320. Its totient is φ = 73029600.

The previous prime is 86221463. The next prime is 86221489. The reversal of 86221487 is 78412268.

It is a cyclic number.

It is not a de Polignac number, because 86221487 - 2⁸ = 86221231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86221487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86221489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9368 + ... + 16130.

It is an arithmetic number, because the mean of its divisors is an integer number (6290520).

Almost surely, 2^86221487 is an apocalyptic number.

86221487 is a deficient number, since it is larger than the sum of its proper divisors (14426833).

86221487 is a wasteful number, since it uses less digits than its factorization.

86221487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854.

The product of its digits is 43008, while the sum is 38.

The square root of 86221487 is about 9285.5525952956. The cubic root of 86221487 is about 441.7791034654.

The spelling of 86221487 in words is "eighty-six million, two hundred twenty-one thousand, four hundred eighty-seven".