51261061 has 2 divisors, whose sum is σ = 51261062. Its totient is φ = 51261060.

The previous prime is 51261053. The next prime is 51261083. The reversal of 51261061 is 16016215.

It is an a-pointer prime, because the next prime (51261083) can be obtained adding 51261061 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 352836 = 7135^2 + 594^2 .

It is a cyclic number.

It is not a de Polignac number, because 51261061 - 2³ = 51261053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51265061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25630530 + 25630531.

It is an arithmetic number, because the mean of its divisors is an integer number (25630531).

Almost surely, 2^51261061 is an apocalyptic number.

It is an amenable number.

51261061 is a deficient number, since it is larger than the sum of its proper divisors (1).

51261061 is an equidigital number, since it uses as much as digits as its factorization.

51261061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51261061 is about 7159.6830237099. The cubic root of 51261061 is about 371.4746626586.

Adding to 51261061 its reverse (16016215), we get a palindrome (67277276).

The spelling of 51261061 in words is "fifty-one million, two hundred sixty-one thousand, sixty-one".