51335861 has 2 divisors, whose sum is σ = 51335862. Its totient is φ = 51335860.

The previous prime is 51335849. The next prime is 51335873. The reversal of 51335861 is 16853315.

It is a balanced prime because it is at equal distance from previous prime (51335849) and next prime (51335873).

It can be written as a sum of positive squares in only one way, i.e., 39564100 + 11771761 = 6290^2 + 3431^2 .

It is a cyclic number.

It is not a de Polignac number, because 51335861 - 2¹⁰ = 51334837 is a prime.

It is a super-2 number, since 2×51335861² = 5270741249222642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51335821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25667930 + 25667931.

It is an arithmetic number, because the mean of its divisors is an integer number (25667931).

Almost surely, 2^51335861 is an apocalyptic number.

It is an amenable number.

51335861 is a deficient number, since it is larger than the sum of its proper divisors (1).

51335861 is an equidigital number, since it uses as much as digits as its factorization.

51335861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 51335861 is about 7164.9048144410. The cubic root of 51335861 is about 371.6552597821.

The spelling of 51335861 in words is "fifty-one million, three hundred thirty-five thousand, eight hundred sixty-one".