51104257 has 2 divisors, whose sum is σ = 51104258. Its totient is φ = 51104256.

The previous prime is 51104239. The next prime is 51104267. The reversal of 51104257 is 75240115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50112241 + 992016 = 7079^2 + 996^2 .

It is a cyclic number.

It is not a de Polignac number, because 51104257 - 2¹¹ = 51102209 is a prime.

It is a super-2 number, since 2×51104257² = 5223290167044098, which contains 22 as substring.

It is equal to p_3063319 and since 51104257 and 3063319 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (51104267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552128 + 25552129.

It is an arithmetic number, because the mean of its divisors is an integer number (25552129).

Almost surely, 2^51104257 is an apocalyptic number.

It is an amenable number.

51104257 is a deficient number, since it is larger than the sum of its proper divisors (1).

51104257 is an equidigital number, since it uses as much as digits as its factorization.

51104257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 51104257 is about 7148.7241519029. The cubic root of 51104257 is about 371.0955041192.

The spelling of 51104257 in words is "fifty-one million, one hundred four thousand, two hundred fifty-seven".