51200749 has 2 divisors, whose sum is σ = 51200750. Its totient is φ = 51200748.

The previous prime is 51200741. The next prime is 51200761. The reversal of 51200749 is 94700215.

It is a happy number.

51200749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51194025 + 6724 = 7155^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 51200749 - 2³ = 51200741 is a prime.

It is a super-2 number, since 2×51200749² = 5243033396322002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51200741) by changing a digit.

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, 25600374 + 25600375.

It is an arithmetic number, because the mean of its divisors is an integer number (25600375).

Almost surely, 2^51200749 is an apocalyptic number.

It is an amenable number.

51200749 is a deficient number, since it is larger than the sum of its proper divisors (1).

51200749 is an equidigital number, since it uses as much as digits as its factorization.

51200749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 51200749 is about 7155.4698657740. The cubic root of 51200749 is about 371.3289173833.

The spelling of 51200749 in words is "fifty-one million, two hundred thousand, seven hundred forty-nine".