50555521 has 2 divisors, whose sum is σ = 50555522. Its totient is φ = 50555520.

The previous prime is 50555509. The next prime is 50555537. The reversal of 50555521 is 12555505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47114496 + 3441025 = 6864^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 50555521 - 2⁵ = 50555489 is a prime.

It is a super-4 number, since 4×50555521⁴ (a number of 32 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 50555521.

It is not a weakly prime, because it can be changed into another prime (50555581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25277760 + 25277761.

It is an arithmetic number, because the mean of its divisors is an integer number (25277761).

Almost surely, 2^50555521 is an apocalyptic number.

It is an amenable number.

50555521 is a deficient number, since it is larger than the sum of its proper divisors (1).

50555521 is an equidigital number, since it uses as much as digits as its factorization.

50555521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 50555521 is about 7110.2405725826. The cubic root of 50555521 is about 369.7624991527.

It can be divided in two parts, 50555 and 521, that added together give a square (51076 = 226²).

The spelling of 50555521 in words is "fifty million, five hundred fifty-five thousand, five hundred twenty-one".