252405533 has 2 divisors, whose sum is σ = 252405534. Its totient is φ = 252405532.

The previous prime is 252405509. The next prime is 252405539. The reversal of 252405533 is 335504252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172607044 + 79798489 = 13138^2 + 8933^2 .

It is a cyclic number.

It is not a de Polignac number, because 252405533 - 2⁶ = 252405469 is a prime.

It is equal to p_13803671 and since 252405533 and 13803671 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 252405496 and 252405505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252405539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126202766 + 126202767.

It is an arithmetic number, because the mean of its divisors is an integer number (126202767).

Almost surely, 2^252405533 is an apocalyptic number.

It is an amenable number.

252405533 is a deficient number, since it is larger than the sum of its proper divisors (1).

252405533 is an equidigital number, since it uses as much as digits as its factorization.

252405533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 29.

The square root of 252405533 is about 15887.2758206056. The cubic root of 252405533 is about 631.9745999045.

Adding to 252405533 its reverse (335504252), we get a palindrome (587909785).

The spelling of 252405533 in words is "two hundred fifty-two million, four hundred five thousand, five hundred thirty-three".