80999451 has 48 divisors (see below), whose sum is σ = 134534400. Its totient is φ = 46547136.

The previous prime is 80999447. The next prime is 80999453. The reversal of 80999451 is 15499908.

It is not a de Polignac number, because 80999451 - 2² = 80999447 is a prime.

It is a super-2 number, since 2×80999451² = 13121822124602802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80999397 and 80999406.

It is not an unprimeable number, because it can be changed into a prime (80999453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184290 + ... + 184728.

It is an arithmetic number, because the mean of its divisors is an integer number (2802800).

Almost surely, 2^80999451 is an apocalyptic number.

80999451 is a deficient number, since it is larger than the sum of its proper divisors (53534949).

80999451 is a wasteful number, since it uses less digits than its factorization.

80999451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 80999451 is about 8999.9694999483. The cubic root of 80999451 is about 432.6738935653.

The spelling of 80999451 in words is "eighty million, nine hundred ninety-nine thousand, four hundred fifty-one".