51122501 has 2 divisors, whose sum is σ = 51122502. Its totient is φ = 51122500.

The previous prime is 51122479. The next prime is 51122507. The reversal of 51122501 is 10522115.

It is a Cunningham number, because it is equal to 7150²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 1 = 7150^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 51122501 - 2⁶ = 51122437 is a prime.

It is a super-2 number, since 2×51122501² = 5227020216990002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51122501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51122507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25561250 + 25561251.

It is an arithmetic number, because the mean of its divisors is an integer number (25561251).

Almost surely, 2^51122501 is an apocalyptic number.

It is an amenable number.

51122501 is a deficient number, since it is larger than the sum of its proper divisors (1).

51122501 is an equidigital number, since it uses as much as digits as its factorization.

51122501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51122501 is about 7150.0000699301. Note that the first 4 decimals coincide. The cubic root of 51122501 is about 371.1396586984.

Adding to 51122501 its reverse (10522115), we get a palindrome (61644616).

The spelling of 51122501 in words is "fifty-one million, one hundred twenty-two thousand, five hundred one".