86355621 has 24 divisors (see below), whose sum is σ = 137090304. Its totient is φ = 51946560.

The previous prime is 86355571. The next prime is 86355637. The reversal of 86355621 is 12655368.

86355621 is a `hidden beast` number, since 86 + 3 + 556 + 21 = 666.

It is not a de Polignac number, because 86355621 - 2¹⁴ = 86339237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86355641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10380 + ... + 16746.

It is an arithmetic number, because the mean of its divisors is an integer number (5712096).

Almost surely, 2^86355621 is an apocalyptic number.

It is an amenable number.

86355621 is a deficient number, since it is larger than the sum of its proper divisors (50734683).

86355621 is a wasteful number, since it uses less digits than its factorization.

86355621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521 (or 6518 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 86355621 is about 9292.7725141639. The cubic root of 86355621 is about 442.0080753764.

The spelling of 86355621 in words is "eighty-six million, three hundred fifty-five thousand, six hundred twenty-one".