51193749 has 24 divisors (see below), whose sum is σ = 73208448. Its totient is φ = 31813120.

The previous prime is 51193717. The next prime is 51193757. The reversal of 51193749 is 94739115.

It is a happy number.

51193749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51193749 - 2⁵ = 51193717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51193249) 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 in 23 ways as a sum of consecutive naturals, for example, 118564 + ... + 118994.

It is an arithmetic number, because the mean of its divisors is an integer number (3050352).

Almost surely, 2^51193749 is an apocalyptic number.

It is an amenable number.

51193749 is a deficient number, since it is larger than the sum of its proper divisors (22014699).

51193749 is a wasteful number, since it uses less digits than its factorization.

51193749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 588 counting only the distinct ones).

The product of its digits is 34020, while the sum is 39.

The square root of 51193749 is about 7154.9807127623. The cubic root of 51193749 is about 371.3119943178.

The spelling of 51193749 in words is "fifty-one million, one hundred ninety-three thousand, seven hundred forty-nine".