52512550421 has 2 divisors, whose sum is σ = 52512550422. Its totient is φ = 52512550420.

The previous prime is 52512550411. The next prime is 52512550451. The reversal of 52512550421 is 12405521525.

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., 41406552196 + 11105998225 = 203486^2 + 105385^2 .

It is a cyclic number.

It is not a de Polignac number, because 52512550421 - 2¹⁸ = 52512288277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52512550411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26256275210 + 26256275211.

It is an arithmetic number, because the mean of its divisors is an integer number (26256275211).

Almost surely, 2^52512550421 is an apocalyptic number.

It is an amenable number.

52512550421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52512550421 is an equidigital number, since it uses as much as digits as its factorization.

52512550421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 52512550421 in words is "fifty-two billion, five hundred twelve million, five hundred fifty thousand, four hundred twenty-one".