51206266 has 4 divisors (see below), whose sum is σ = 76809402. Its totient is φ = 25603132.

The previous prime is 51206231. The next prime is 51206333. The reversal of 51206266 is 66260215.

51206266 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 34633225 + 16573041 = 5885^2 + 4071^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12801565 + ... + 12801568.

Almost surely, 2^51206266 is an apocalyptic number.

51206266 is a deficient number, since it is larger than the sum of its proper divisors (25603136).

51206266 is a wasteful number, since it uses less digits than its factorization.

51206266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25603135.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 51206266 is about 7155.8553646647. The cubic root of 51206266 is about 371.3422540897.

The spelling of 51206266 in words is "fifty-one million, two hundred six thousand, two hundred sixty-six".