51947366 has 4 divisors (see below), whose sum is σ = 77921052. Its totient is φ = 25973682.

The previous prime is 51947353. The next prime is 51947377. The reversal of 51947366 is 66374915.

51947366 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 is a congruent number.

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, 12986840 + ... + 12986843.

It is an arithmetic number, because the mean of its divisors is an integer number (19480263).

Almost surely, 2^51947366 is an apocalyptic number.

51947366 is a deficient number, since it is larger than the sum of its proper divisors (25973686).

51947366 is a wasteful number, since it uses less digits than its factorization.

51947366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25973685.

The product of its digits is 136080, while the sum is 41.

The square root of 51947366 is about 7207.4521156925. The cubic root of 51947366 is about 373.1251391986.

The spelling of 51947366 in words is "fifty-one million, nine hundred forty-seven thousand, three hundred sixty-six".