51468409 has 2 divisors, whose sum is σ = 51468410. Its totient is φ = 51468408.

The previous prime is 51468349. The next prime is 51468413. The reversal of 51468409 is 90486415.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28858384 + 22610025 = 5372^2 + 4755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51468409 is a prime.

It is not a weakly prime, because it can be changed into another prime (51468419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25734204 + 25734205.

It is an arithmetic number, because the mean of its divisors is an integer number (25734205).

Almost surely, 2^51468409 is an apocalyptic number.

It is an amenable number.

51468409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51468409 is an equidigital number, since it uses as much as digits as its factorization.

51468409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 51468409 is about 7174.1486602941. The cubic root of 51468409 is about 371.9748532930.

The spelling of 51468409 in words is "fifty-one million, four hundred sixty-eight thousand, four hundred nine".