51575231 has 2 divisors, whose sum is σ = 51575232. Its totient is φ = 51575230.

The previous prime is 51575179. The next prime is 51575261. The reversal of 51575231 is 13257515.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51575231 - 2¹⁰ = 51574207 is a prime.

It is a super-2 number, since 2×51575231² = 5320008905406722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51575194 and 51575203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51575261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25787615 + 25787616.

It is an arithmetic number, because the mean of its divisors is an integer number (25787616).

Almost surely, 2^51575231 is an apocalyptic number.

51575231 is a deficient number, since it is larger than the sum of its proper divisors (1).

51575231 is an equidigital number, since it uses as much as digits as its factorization.

51575231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5250, while the sum is 29.

The square root of 51575231 is about 7181.5897265160. The cubic root of 51575231 is about 372.2320184183.

The spelling of 51575231 in words is "fifty-one million, five hundred seventy-five thousand, two hundred thirty-one".