81807027 has 16 divisors (see below), whose sum is σ = 117490560. Its totient is φ = 50464512.

The previous prime is 81806993. The next prime is 81807031. The reversal of 81807027 is 72070818.

It is not a de Polignac number, because 81807027 - 2¹⁰ = 81806003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81807127) 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, 14238 + ... + 19139.

It is an arithmetic number, because the mean of its divisors is an integer number (7343160).

Almost surely, 2^81807027 is an apocalyptic number.

81807027 is a deficient number, since it is larger than the sum of its proper divisors (35683533).

81807027 is a wasteful number, since it uses less digits than its factorization.

81807027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33442.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 81807027 is about 9044.7237105398. The cubic root of 81807027 is about 434.1070810408.

The spelling of 81807027 in words is "eighty-one million, eight hundred seven thousand, twenty-seven".