52021553 has 2 divisors, whose sum is σ = 52021554. Its totient is φ = 52021552.

The previous prime is 52021549. The next prime is 52021559. The reversal of 52021553 is 35512025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36276529 + 15745024 = 6023^2 + 3968^2 .

It is a cyclic number.

It is not a de Polignac number, because 52021553 - 2² = 52021549 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52021559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26010776 + 26010777.

It is an arithmetic number, because the mean of its divisors is an integer number (26010777).

Almost surely, 2^52021553 is an apocalyptic number.

It is an amenable number.

52021553 is a deficient number, since it is larger than the sum of its proper divisors (1).

52021553 is an equidigital number, since it uses as much as digits as its factorization.

52021553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 52021553 is about 7212.5968277729. The cubic root of 52021553 is about 373.3026770285.

Adding to 52021553 its reverse (35512025), we get a palindrome (87533578).

The spelling of 52021553 in words is "fifty-two million, twenty-one thousand, five hundred fifty-three".