51745997 has 4 divisors (see below), whose sum is σ = 51763296. Its totient is φ = 51728700.

The previous prime is 51745979. The next prime is 51746003. The reversal of 51745997 is 79954715.

51745997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51745997 - 2⁶ = 51745933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51745927) 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 3 ways as a sum of consecutive naturals, for example, 2879 + ... + 10572.

It is an arithmetic number, because the mean of its divisors is an integer number (12940824).

Almost surely, 2^51745997 is an apocalyptic number.

It is an amenable number.

51745997 is a deficient number, since it is larger than the sum of its proper divisors (17299).

51745997 is a wasteful number, since it uses less digits than its factorization.

51745997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17298.

The product of its digits is 396900, while the sum is 47.

The square root of 51745997 is about 7193.4690518553. The cubic root of 51745997 is about 372.6423868976.

The spelling of 51745997 in words is "fifty-one million, seven hundred forty-five thousand, nine hundred ninety-seven".