51095521 has 2 divisors, whose sum is σ = 51095522. Its totient is φ = 51095520.

The previous prime is 51095509. The next prime is 51095537. The reversal of 51095521 is 12559015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40500496 + 10595025 = 6364^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 51095521 - 2²³ = 42706913 is a prime.

It is a super-2 number, since 2×51095521² = 5221504532522882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51095521.

It is not a weakly prime, because it can be changed into another prime (51095501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25547760 + 25547761.

It is an arithmetic number, because the mean of its divisors is an integer number (25547761).

Almost surely, 2^51095521 is an apocalyptic number.

It is an amenable number.

51095521 is a deficient number, since it is larger than the sum of its proper divisors (1).

51095521 is an equidigital number, since it uses as much as digits as its factorization.

51095521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 51095521 is about 7148.1131076669. The cubic root of 51095521 is about 371.0743573155.

The spelling of 51095521 in words is "fifty-one million, ninety-five thousand, five hundred twenty-one".