51800401 has 2 divisors, whose sum is σ = 51800402. Its totient is φ = 51800400.

The previous prime is 51800389. The next prime is 51800429. The reversal of 51800401 is 10400815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36590401 + 15210000 = 6049^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 51800401 - 2¹¹ = 51798353 is a prime.

It is not a weakly prime, because it can be changed into another prime (51800431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25900200 + 25900201.

It is an arithmetic number, because the mean of its divisors is an integer number (25900201).

Almost surely, 2^51800401 is an apocalyptic number.

It is an amenable number.

51800401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51800401 is an equidigital number, since it uses as much as digits as its factorization.

51800401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 51800401 is about 7197.2495440967. The cubic root of 51800401 is about 372.7729357122.

The spelling of 51800401 in words is "fifty-one million, eight hundred thousand, four hundred one".