80817251 has 8 divisors (see below), whose sum is σ = 81945360. Its totient is φ = 79694208.

The previous prime is 80817211. The next prime is 80817263. The reversal of 80817251 is 15271808.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 80817251 - 2¹⁸ = 80555107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80817211) 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, 39680 + ... + 41666.

It is an arithmetic number, because the mean of its divisors is an integer number (10243170).

Almost surely, 2^80817251 is an apocalyptic number.

80817251 is a deficient number, since it is larger than the sum of its proper divisors (1128109).

80817251 is a wasteful number, since it uses less digits than its factorization.

80817251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 80817251 is about 8989.8415447660. The cubic root of 80817251 is about 432.3492314206.

The spelling of 80817251 in words is "eighty million, eight hundred seventeen thousand, two hundred fifty-one".