51749207 has 12 divisors (see below), whose sum is σ = 55274736. Its totient is φ = 48437760.

The previous prime is 51749197. The next prime is 51749213. The reversal of 51749207 is 70294715.

51749207 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 51749207 - 2²⁴ = 34971991 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 (51749507) 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 11 ways as a sum of consecutive naturals, for example, 69278 + ... + 70020.

It is an arithmetic number, because the mean of its divisors is an integer number (4606228).

Almost surely, 2^51749207 is an apocalyptic number.

51749207 is a deficient number, since it is larger than the sum of its proper divisors (3525529).

51749207 is a wasteful number, since it uses less digits than its factorization.

51749207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 51749207 is about 7193.6921674478. The cubic root of 51749207 is about 372.6500922107.

The spelling of 51749207 in words is "fifty-one million, seven hundred forty-nine thousand, two hundred seven".