51340747 has 4 divisors (see below), whose sum is σ = 51408280. Its totient is φ = 51273216.

The previous prime is 51340741. The next prime is 51340763. The reversal of 51340747 is 74704315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51340747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51340741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32613 + ... + 34150.

It is an arithmetic number, because the mean of its divisors is an integer number (12852070).

Almost surely, 2^51340747 is an apocalyptic number.

51340747 is a deficient number, since it is larger than the sum of its proper divisors (67533).

51340747 is an equidigital number, since it uses as much as digits as its factorization.

51340747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67532.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 51340747 is about 7165.2457738727. The cubic root of 51340747 is about 371.6670504352.

The spelling of 51340747 in words is "fifty-one million, three hundred forty thousand, seven hundred forty-seven".