51190747 has 4 divisors (see below), whose sum is σ = 51954856. Its totient is φ = 50426640.

The previous prime is 51190729. The next prime is 51190817. The reversal of 51190747 is 74709115.

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

It is a cyclic number.

It is not a de Polignac number, because 51190747 - 2¹⁹ = 50666459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51190547) 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, 381954 + ... + 382087.

It is an arithmetic number, because the mean of its divisors is an integer number (12988714).

Almost surely, 2^51190747 is an apocalyptic number.

51190747 is a deficient number, since it is larger than the sum of its proper divisors (764109).

51190747 is an equidigital number, since it uses as much as digits as its factorization.

51190747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764108.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 51190747 is about 7154.7709257530. The cubic root of 51190747 is about 371.3047362677.

The spelling of 51190747 in words is "fifty-one million, one hundred ninety thousand, seven hundred forty-seven".