51004001 has 2 divisors, whose sum is σ = 51004002. Its totient is φ = 51004000.

The previous prime is 51003989. The next prime is 51004003. The reversal of 51004001 is 10040015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49561600 + 1442401 = 7040^2 + 1201^2 .

It is a cyclic number.

It is not a de Polignac number, because 51004001 - 2⁶ = 51003937 is a prime.

Together with 51004003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51004003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25502000 + 25502001.

It is an arithmetic number, because the mean of its divisors is an integer number (25502001).

Almost surely, 2^51004001 is an apocalyptic number.

It is an amenable number.

51004001 is a deficient number, since it is larger than the sum of its proper divisors (1).

51004001 is an equidigital number, since it uses as much as digits as its factorization.

51004001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 51004001 is about 7141.7085490798. The cubic root of 51004001 is about 370.8526743381.

Adding to 51004001 its reverse (10040015), we get a palindrome (61044016).

The spelling of 51004001 in words is "fifty-one million, four thousand, one".