51101749 has 2 divisors, whose sum is σ = 51101750. Its totient is φ = 51101748.

The previous prime is 51101747. The next prime is 51101767. The reversal of 51101749 is 94710115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43362225 + 7739524 = 6585^2 + 2782^2 .

It is a cyclic number.

It is not a de Polignac number, because 51101749 - 2¹ = 51101747 is a prime.

It is a super-2 number, since 2×51101749² = 5222777501718002, which contains 22 as substring.

Together with 51101747, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51101747) 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, 25550874 + 25550875.

It is an arithmetic number, because the mean of its divisors is an integer number (25550875).

Almost surely, 2^51101749 is an apocalyptic number.

It is an amenable number.

51101749 is a deficient number, since it is larger than the sum of its proper divisors (1).

51101749 is an equidigital number, since it uses as much as digits as its factorization.

51101749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 51101749 is about 7148.5487338340. The cubic root of 51101749 is about 371.0894333741.

It can be divided in two parts, 5110 and 1749, that added together give a cube (6859 = 19³).

The spelling of 51101749 in words is "fifty-one million, one hundred one thousand, seven hundred forty-nine".