51290269 has 2 divisors, whose sum is σ = 51290270. Its totient is φ = 51290268.

The previous prime is 51290263. The next prime is 51290287. The reversal of 51290269 is 96209215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 8191044 = 6565^2 + 2862^2 .

It is a cyclic number.

It is not a de Polignac number, because 51290269 - 2⁵ = 51290237 is a prime.

It is a super-2 number, since 2×51290269² = 5261383388184722, which contains 22 as substring.

It is equal to p_3073786 and since 51290269 and 3073786 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51290263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25645134 + 25645135.

It is an arithmetic number, because the mean of its divisors is an integer number (25645135).

Almost surely, 2^51290269 is an apocalyptic number.

It is an amenable number.

51290269 is a deficient number, since it is larger than the sum of its proper divisors (1).

51290269 is an equidigital number, since it uses as much as digits as its factorization.

51290269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 51290269 is about 7161.7224883404. The cubic root of 51290269 is about 371.5452033487.

The spelling of 51290269 in words is "fifty-one million, two hundred ninety thousand, two hundred sixty-nine".