51635401 has 2 divisors, whose sum is σ = 51635402. Its totient is φ = 51635400.

The previous prime is 51635393. The next prime is 51635411. The reversal of 51635401 is 10453615.

51635401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38502025 + 13133376 = 6205^2 + 3624^2 .

It is a cyclic number.

It is not a de Polignac number, because 51635401 - 2³ = 51635393 is a prime.

It is not a weakly prime, because it can be changed into another prime (51635411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25817700 + 25817701.

It is an arithmetic number, because the mean of its divisors is an integer number (25817701).

Almost surely, 2^51635401 is an apocalyptic number.

It is an amenable number.

51635401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51635401 is an equidigital number, since it uses as much as digits as its factorization.

51635401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51635401 is about 7185.7776892971. Note that the first 3 decimals coincide. The cubic root of 51635401 is about 372.3767164054.

The spelling of 51635401 in words is "fifty-one million, six hundred thirty-five thousand, four hundred one".