51575261 has 2 divisors, whose sum is σ = 51575262. Its totient is φ = 51575260.

The previous prime is 51575231. The next prime is 51575267. The reversal of 51575261 is 16257515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 1943236 = 7045^2 + 1394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51575261 is a prime.

It is equal to p_3089912 and since 51575261 and 3089912 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51575267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25787630 + 25787631.

It is an arithmetic number, because the mean of its divisors is an integer number (25787631).

Almost surely, 2^51575261 is an apocalyptic number.

It is an amenable number.

51575261 is a deficient number, since it is larger than the sum of its proper divisors (1).

51575261 is an equidigital number, since it uses as much as digits as its factorization.

51575261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 32.

The square root of 51575261 is about 7181.5918151897. The cubic root of 51575261 is about 372.2320905909.

The spelling of 51575261 in words is "fifty-one million, five hundred seventy-five thousand, two hundred sixty-one".