51738645 has 32 divisors (see below), whose sum is σ = 95219712. Its totient is φ = 23499072.

The previous prime is 51738641. The next prime is 51738647. The reversal of 51738645 is 54683715.

It is not a de Polignac number, because 51738645 - 2² = 51738641 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 (51738641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15604 + ... + 18626.

It is an arithmetic number, because the mean of its divisors is an integer number (2975616).

Almost surely, 2^51738645 is an apocalyptic number.

It is an amenable number.

51738645 is a deficient number, since it is larger than the sum of its proper divisors (43481067).

51738645 is a wasteful number, since it uses less digits than its factorization.

51738645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201.

The product of its digits is 100800, while the sum is 39.

The square root of 51738645 is about 7192.9580146140. The cubic root of 51738645 is about 372.6247378893.

The spelling of 51738645 in words is "fifty-one million, seven hundred thirty-eight thousand, six hundred forty-five".