80725551 has 8 divisors (see below), whose sum is σ = 108931200. Its totient is φ = 53168472.

The previous prime is 80725549. The next prime is 80725591. The reversal of 80725551 is 15552708.

It is a happy number.

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

It is not a de Polignac number, because 80725551 - 2¹ = 80725549 is a prime.

It is a super-2 number, since 2×80725551² = 13033229168507202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80725591) 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, 161851 + ... + 162348.

It is an arithmetic number, because the mean of its divisors is an integer number (13616400).

Almost surely, 2^80725551 is an apocalyptic number.

80725551 is a deficient number, since it is larger than the sum of its proper divisors (28205649).

80725551 is a wasteful number, since it uses less digits than its factorization.

80725551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324285.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 80725551 is about 8984.7398960682. The cubic root of 80725551 is about 432.1856465896.

The spelling of 80725551 in words is "eighty million, seven hundred twenty-five thousand, five hundred fifty-one".