80399551 has 4 divisors (see below), whose sum is σ = 82269352. Its totient is φ = 78529752.

The previous prime is 80399549. The next prime is 80399573. The reversal of 80399551 is 15599308.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80399551 - 2¹ = 80399549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80399521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 934836 + ... + 934921.

It is an arithmetic number, because the mean of its divisors is an integer number (20567338).

Almost surely, 2^80399551 is an apocalyptic number.

80399551 is a deficient number, since it is larger than the sum of its proper divisors (1869801).

80399551 is a wasteful number, since it uses less digits than its factorization.

80399551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869800.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 80399551 is about 8966.5796712013. The cubic root of 80399551 is about 431.6030858654.

The spelling of 80399551 in words is "eighty million, three hundred ninety-nine thousand, five hundred fifty-one".