51278306 has 8 divisors (see below), whose sum is σ = 77679324. Its totient is φ = 25385200.

The previous prime is 51278303. The next prime is 51278323. The reversal of 51278306 is 60387215.

It is a happy number.

51278306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 34916281 + 16362025 = 5909^2 + 4045^2 .

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

It is a super-3 number, since 3×51278306³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51278303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126725 + ... + 127128.

Almost surely, 2^51278306 is an apocalyptic number.

51278306 is a deficient number, since it is larger than the sum of its proper divisors (26401018).

51278306 is a wasteful number, since it uses less digits than its factorization.

51278306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253956.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 51278306 is about 7160.8872355316. The cubic root of 51278306 is about 371.5163145623.

The spelling of 51278306 in words is "fifty-one million, two hundred seventy-eight thousand, three hundred six".