50915621 has 2 divisors, whose sum is σ = 50915622. Its totient is φ = 50915620.

The previous prime is 50915597. The next prime is 50915651. The reversal of 50915621 is 12651905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 7396 = 7135^2 + 86^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50915621 is a prime.

It is a Sophie Germain 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 (50915651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25457810 + 25457811.

It is an arithmetic number, because the mean of its divisors is an integer number (25457811).

Almost surely, 2^50915621 is an apocalyptic number.

It is an amenable number.

50915621 is a deficient number, since it is larger than the sum of its proper divisors (1).

50915621 is an equidigital number, since it uses as much as digits as its factorization.

50915621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 50915621 is about 7135.5182712961. The cubic root of 50915621 is about 370.6383453416.

The spelling of 50915621 in words is "fifty million, nine hundred fifteen thousand, six hundred twenty-one".