51500101 has 2 divisors, whose sum is σ = 51500102. Its totient is φ = 51500100.

The previous prime is 51500087. The next prime is 51500147. The reversal of 51500101 is 10100515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 19351201 = 5670^2 + 4399^2 .

It is a cyclic number.

It is not a de Polignac number, because 51500101 - 2⁵ = 51500069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51500401) 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, 25750050 + 25750051.

It is an arithmetic number, because the mean of its divisors is an integer number (25750051).

Almost surely, 2^51500101 is an apocalyptic number.

It is an amenable number.

51500101 is a deficient number, since it is larger than the sum of its proper divisors (1).

51500101 is an equidigital number, since it uses as much as digits as its factorization.

51500101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 51500101 is about 7176.3570842037. The cubic root of 51500101 is about 372.0511862545.

Adding to 51500101 its reverse (10100515), we get a palindrome (61600616).

The spelling of 51500101 in words is "fifty-one million, five hundred thousand, one hundred one".