50551315421 has 2 divisors, whose sum is σ = 50551315422. Its totient is φ = 50551315420.

The previous prime is 50551315411. The next prime is 50551315427. The reversal of 50551315421 is 12451315505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27377342521 + 23173972900 = 165461^2 + 152230^2 .

It is a cyclic number.

It is not a de Polignac number, because 50551315421 - 2¹⁰ = 50551314397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50551315427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25275657710 + 25275657711.

It is an arithmetic number, because the mean of its divisors is an integer number (25275657711).

Almost surely, 2^50551315421 is an apocalyptic number.

It is an amenable number.

50551315421 is a deficient number, since it is larger than the sum of its proper divisors (1).

50551315421 is an equidigital number, since it uses as much as digits as its factorization.

50551315421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 50551315421 in words is "fifty billion, five hundred fifty-one million, three hundred fifteen thousand, four hundred twenty-one".