52136521 has 2 divisors, whose sum is σ = 52136522. Its totient is φ = 52136520.

The previous prime is 52136477. The next prime is 52136549. The reversal of 52136521 is 12563125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46730896 + 5405625 = 6836^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 52136521 - 2⁷ = 52136393 is a prime.

It is not a weakly prime, because it can be changed into another prime (52136221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26068260 + 26068261.

It is an arithmetic number, because the mean of its divisors is an integer number (26068261).

Almost surely, 2^52136521 is an apocalyptic number.

It is an amenable number.

52136521 is a deficient number, since it is larger than the sum of its proper divisors (1).

52136521 is an equidigital number, since it uses as much as digits as its factorization.

52136521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 52136521 is about 7220.5623742199. The cubic root of 52136521 is about 373.5774752112.

Adding to 52136521 its reverse (12563125), we get a palindrome (64699646).

The spelling of 52136521 in words is "fifty-two million, one hundred thirty-six thousand, five hundred twenty-one".