51432739 has 2 divisors, whose sum is σ = 51432740. Its totient is φ = 51432738.

The previous prime is 51432707. The next prime is 51432757. The reversal of 51432739 is 93723415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51432739 - 2⁵ = 51432707 is a prime.

It is not a weakly prime, because it can be changed into another prime (51436739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25716369 + 25716370.

It is an arithmetic number, because the mean of its divisors is an integer number (25716370).

Almost surely, 2^51432739 is an apocalyptic number.

51432739 is a deficient number, since it is larger than the sum of its proper divisors (1).

51432739 is an equidigital number, since it uses as much as digits as its factorization.

51432739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 51432739 is about 7171.6622201551. The cubic root of 51432739 is about 371.8889014788. Note that the first 3 decimals are identical.

The spelling of 51432739 in words is "fifty-one million, four hundred thirty-two thousand, seven hundred thirty-nine".