51355237 has 2 divisors, whose sum is σ = 51355238. Its totient is φ = 51355236.

The previous prime is 51355231. The next prime is 51355253. The reversal of 51355237 is 73255315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 1779556 = 7041^2 + 1334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51355237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51355199 and 51355208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51355231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677618 + 25677619.

It is an arithmetic number, because the mean of its divisors is an integer number (25677619).

Almost surely, 2^51355237 is an apocalyptic number.

It is an amenable number.

51355237 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355237 is an equidigital number, since it uses as much as digits as its factorization.

51355237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15750, while the sum is 31.

The square root of 51355237 is about 7166.2568332429. The cubic root of 51355237 is about 371.7020125871.

The spelling of 51355237 in words is "fifty-one million, three hundred fifty-five thousand, two hundred thirty-seven".