252566971 has 2 divisors, whose sum is σ = 252566972. Its totient is φ = 252566970.

The previous prime is 252566969. The next prime is 252567037. The reversal of 252566971 is 179665252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252566971 - 2¹ = 252566969 is a prime.

It is a super-3 number, since 3×252566971³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 252566969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (252566071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126283485 + 126283486.

It is an arithmetic number, because the mean of its divisors is an integer number (126283486).

Almost surely, 2^252566971 is an apocalyptic number.

252566971 is a deficient number, since it is larger than the sum of its proper divisors (1).

252566971 is an equidigital number, since it uses as much as digits as its factorization.

252566971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 43.

The square root of 252566971 is about 15892.3557410473. The cubic root of 252566971 is about 632.1093076905.

It can be divided in two parts, 2525 and 66971, that added together give a palindrome (69496).

The spelling of 252566971 in words is "two hundred fifty-two million, five hundred sixty-six thousand, nine hundred seventy-one".