80278133 has 8 divisors (see below), whose sum is σ = 87310776. Its totient is φ = 73368000.

The previous prime is 80278129. The next prime is 80278139. The reversal of 80278133 is 33187208.

It can be written as a sum of positive squares in 4 ways, for example, as 39853969 + 40424164 = 6313^2 + 6358^2 .

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 80278133 - 2² = 80278129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80278133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80278139) 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, 29258 + ... + 31883.

It is an arithmetic number, because the mean of its divisors is an integer number (10913847).

Almost surely, 2^80278133 is an apocalyptic number.

It is an amenable number.

80278133 is a deficient number, since it is larger than the sum of its proper divisors (7032643).

80278133 is a wasteful number, since it uses less digits than its factorization.

80278133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61255.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 80278133 is about 8959.8065269290. The cubic root of 80278133 is about 431.3857099180.

The spelling of 80278133 in words is "eighty million, two hundred seventy-eight thousand, one hundred thirty-three".