86215493 has 8 divisors (see below), whose sum is σ = 106111488. Its totient is φ = 68214384.

The previous prime is 86215489. The next prime is 86215499. The reversal of 86215493 is 39451268.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 86215493 - 2² = 86215489 is a prime.

It is a super-2 number, since 2×86215493² = 14866222466466098, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86215499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473621 + ... + 473802.

It is an arithmetic number, because the mean of its divisors is an integer number (13263936).

Almost surely, 2^86215493 is an apocalyptic number.

It is an amenable number.

86215493 is a deficient number, since it is larger than the sum of its proper divisors (19895995).

86215493 is a wasteful number, since it uses less digits than its factorization.

86215493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947443.

The product of its digits is 51840, while the sum is 38.

The square root of 86215493 is about 9285.2298302196. The cubic root of 86215493 is about 441.7688659349.

The spelling of 86215493 in words is "eighty-six million, two hundred fifteen thousand, four hundred ninety-three".