51264181 has 2 divisors, whose sum is σ = 51264182. Its totient is φ = 51264180.

The previous prime is 51264151. The next prime is 51264193. The reversal of 51264181 is 18146215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48525156 + 2739025 = 6966^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 51264181 - 2⁷ = 51264053 is a prime.

It is a super-2 number, since 2×51264181² = 5256032507201522, 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 (51264151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25632090 + 25632091.

It is an arithmetic number, because the mean of its divisors is an integer number (25632091).

Almost surely, 2^51264181 is an apocalyptic number.

It is an amenable number.

51264181 is a deficient number, since it is larger than the sum of its proper divisors (1).

51264181 is an equidigital number, since it uses as much as digits as its factorization.

51264181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 51264181 is about 7159.9009071355. The cubic root of 51264181 is about 371.4821990967.

The spelling of 51264181 in words is "fifty-one million, two hundred sixty-four thousand, one hundred eighty-one".