51258401 has 2 divisors, whose sum is σ = 51258402. Its totient is φ = 51258400.

The previous prime is 51258397. The next prime is 51258419. The reversal of 51258401 is 10485215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 564001 = 7120^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 51258401 - 2² = 51258397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51258481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25629200 + 25629201.

It is an arithmetic number, because the mean of its divisors is an integer number (25629201).

Almost surely, 2^51258401 is an apocalyptic number.

It is an amenable number.

51258401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51258401 is an equidigital number, since it uses as much as digits as its factorization.

51258401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 51258401 is about 7159.4972588863. The cubic root of 51258401 is about 371.4682371206.

The spelling of 51258401 in words is "fifty-one million, two hundred fifty-eight thousand, four hundred one".