252651071 has 2 divisors, whose sum is σ = 252651072. Its totient is φ = 252651070.

The previous prime is 252651043. The next prime is 252651073. The reversal of 252651071 is 170156252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252651071 is a prime.

It is a super-3 number, since 3×252651071³ (a number of 26 digits) contains 333 as substring.

Together with 252651073, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_13816370 and since 252651071 and 13816370 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252651073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126325535 + 126325536.

It is an arithmetic number, because the mean of its divisors is an integer number (126325536).

Almost surely, 2^252651071 is an apocalyptic number.

252651071 is a deficient number, since it is larger than the sum of its proper divisors (1).

252651071 is an equidigital number, since it uses as much as digits as its factorization.

252651071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 252651071 is about 15895.0014469958. The cubic root of 252651071 is about 632.1794600323.

The spelling of 252651071 in words is "two hundred fifty-two million, six hundred fifty-one thousand, seventy-one".