86631519 has 8 divisors (see below), whose sum is σ = 124394032. Its totient is φ = 53311680.

The previous prime is 86631491. The next prime is 86631553. The reversal of 86631519 is 91513668.

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

It is not a de Polignac number, because 86631519 - 2⁹ = 86631007 is a prime.

It is a super-2 number, since 2×86631519² = 15010040168494722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2221321 = 86631519 / (8 + 6 + 6 + 3 + 1 + 5 + 1 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86631619) 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, 1110622 + ... + 1110699.

It is an arithmetic number, because the mean of its divisors is an integer number (15549254).

Almost surely, 2^86631519 is an apocalyptic number.

86631519 is a deficient number, since it is larger than the sum of its proper divisors (37762513).

86631519 is a wasteful number, since it uses less digits than its factorization.

86631519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221337.

The product of its digits is 38880, while the sum is 39.

The square root of 86631519 is about 9307.6054385647. The cubic root of 86631519 is about 442.4782995519.

It can be divided in two parts, 866 and 31519, that added together give a triangular number (32385 = T₂₅₄).

The spelling of 86631519 in words is "eighty-six million, six hundred thirty-one thousand, five hundred nineteen".