5151501221 has 2 divisors, whose sum is σ = 5151501222. Its totient is φ = 5151501220.

The previous prime is 5151501193. The next prime is 5151501227. The reversal of 5151501221 is 1221051515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4063425025 + 1088076196 = 63745^2 + 32986^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151501221 - 2¹⁸ = 5151239077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5151501227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2575750610 + 2575750611.

It is an arithmetic number, because the mean of its divisors is an integer number (2575750611).

Almost surely, 2^5151501221 is an apocalyptic number.

It is an amenable number.

5151501221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5151501221 is an equidigital number, since it uses as much as digits as its factorization.

5151501221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 5151501221 is about 71773.9592122380. The cubic root of 5151501221 is about 1727.0752838319.

Adding to 5151501221 its reverse (1221051515), we get a palindrome (6372552736).

The spelling of 5151501221 in words is "five billion, one hundred fifty-one million, five hundred one thousand, two hundred twenty-one".