50351621261 has 2 divisors, whose sum is σ = 50351621262. Its totient is φ = 50351621260.

The previous prime is 50351621239. The next prime is 50351621279. The reversal of 50351621261 is 16212615305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29926924036 + 20424697225 = 172994^2 + 142915^2 .

It is a cyclic number.

It is not a de Polignac number, because 50351621261 - 2¹⁸ = 50351359117 is a prime.

It is a super-2 number, since 2×50351621261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50351621861) 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, 25175810630 + 25175810631.

It is an arithmetic number, because the mean of its divisors is an integer number (25175810631).

Almost surely, 2^50351621261 is an apocalyptic number.

It is an amenable number.

50351621261 is a deficient number, since it is larger than the sum of its proper divisors (1).

50351621261 is an equidigital number, since it uses as much as digits as its factorization.

50351621261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 50351621261 in words is "fifty billion, three hundred fifty-one million, six hundred twenty-one thousand, two hundred sixty-one".