51810461 has 2 divisors, whose sum is σ = 51810462. Its totient is φ = 51810460.

The previous prime is 51810457. The next prime is 51810481. The reversal of 51810461 is 16401815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 42436 = 7195^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 51810461 - 2² = 51810457 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51810461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51810431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25905230 + 25905231.

It is an arithmetic number, because the mean of its divisors is an integer number (25905231).

Almost surely, 2^51810461 is an apocalyptic number.

It is an amenable number.

51810461 is a deficient number, since it is larger than the sum of its proper divisors (1).

51810461 is an equidigital number, since it uses as much as digits as its factorization.

51810461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 51810461 is about 7197.9483882562. The cubic root of 51810461 is about 372.7970658535.

The spelling of 51810461 in words is "fifty-one million, eight hundred ten thousand, four hundred sixty-one".