51747261 has 8 divisors (see below), whose sum is σ = 69253920. Its totient is φ = 34369392.

The previous prime is 51747257. The next prime is 51747271. The reversal of 51747261 is 16274715.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51747261 - 2² = 51747257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51747211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31255 + ... + 32868.

It is an arithmetic number, because the mean of its divisors is an integer number (8656740).

Almost surely, 2^51747261 is an apocalyptic number.

It is an amenable number.

51747261 is a deficient number, since it is larger than the sum of its proper divisors (17506659).

51747261 is a wasteful number, since it uses less digits than its factorization.

51747261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64395.

The product of its digits is 11760, while the sum is 33.

The square root of 51747261 is about 7193.5569087900. The cubic root of 51747261 is about 372.6454210527.

The spelling of 51747261 in words is "fifty-one million, seven hundred forty-seven thousand, two hundred sixty-one".