51374647 has 2 divisors, whose sum is σ = 51374648. Its totient is φ = 51374646.

The previous prime is 51374641. The next prime is 51374669. The reversal of 51374647 is 74647315.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51374647 - 2²³ = 42986039 is a prime.

It is equal to p_3078568 and since 51374647 and 3078568 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51374641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25687323 + 25687324.

It is an arithmetic number, because the mean of its divisors is an integer number (25687324).

Almost surely, 2^51374647 is an apocalyptic number.

51374647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51374647 is an equidigital number, since it uses as much as digits as its factorization.

51374647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 51374647 is about 7167.6109687957. The cubic root of 51374647 is about 371.7488356424.

The spelling of 51374647 in words is "fifty-one million, three hundred seventy-four thousand, six hundred forty-seven".