51023201 has 2 divisors, whose sum is σ = 51023202. Its totient is φ = 51023200.

The previous prime is 51023191. The next prime is 51023207. The reversal of 51023201 is 10232015.

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., 38738176 + 12285025 = 6224^2 + 3505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51023201 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 (51023207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25511600 + 25511601.

It is an arithmetic number, because the mean of its divisors is an integer number (25511601).

Almost surely, 2^51023201 is an apocalyptic number.

It is an amenable number.

51023201 is a deficient number, since it is larger than the sum of its proper divisors (1).

51023201 is an equidigital number, since it uses as much as digits as its factorization.

51023201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 51023201 is about 7143.0526387533. The cubic root of 51023201 is about 370.8992032242.

Adding to 51023201 its reverse (10232015), we get a palindrome (61255216).

The spelling of 51023201 in words is "fifty-one million, twenty-three thousand, two hundred one".