51261293 has 2 divisors, whose sum is σ = 51261294. Its totient is φ = 51261292.

The previous prime is 51261281. The next prime is 51261311. The reversal of 51261293 is 39216215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50951044 + 310249 = 7138^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 51261293 - 2⁴ = 51261277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51261263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25630646 + 25630647.

It is an arithmetic number, because the mean of its divisors is an integer number (25630647).

Almost surely, 2^51261293 is an apocalyptic number.

It is an amenable number.

51261293 is a deficient number, since it is larger than the sum of its proper divisors (1).

51261293 is an equidigital number, since it uses as much as digits as its factorization.

51261293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 51261293 is about 7159.6992255262. The cubic root of 51261293 is about 371.4752230710.

The spelling of 51261293 in words is "fifty-one million, two hundred sixty-one thousand, two hundred ninety-three".