51501101 has 2 divisors, whose sum is σ = 51501102. Its totient is φ = 51501100.

The previous prime is 51501097. The next prime is 51501103. The reversal of 51501101 is 10110515.

51501101 = 5074² + 5075².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25755625 + 25745476 = 5075^2 + 5074^2 .

It is a cyclic number.

It is not a de Polignac number, because 51501101 - 2² = 51501097 is a prime.

It is a Sophie Germain prime.

Together with 51501103, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51501103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25750550 + 25750551.

It is an arithmetic number, because the mean of its divisors is an integer number (25750551).

Almost surely, 2^51501101 is an apocalyptic number.

51501101 is the 5075-th centered square number.

It is an amenable number.

51501101 is a deficient number, since it is larger than the sum of its proper divisors (1).

51501101 is an equidigital number, since it uses as much as digits as its factorization.

51501101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25, while the sum is 14.

The square root of 51501101 is about 7176.4267570985. The cubic root of 51501101 is about 372.0535943324.

Adding to 51501101 its reverse (10110515), we get a palindrome (61611616).

The spelling of 51501101 in words is "fifty-one million, five hundred one thousand, one hundred one".