252643347 has 32 divisors (see below), whose sum is σ = 414097920. Its totient is φ = 150948000.

The previous prime is 252643337. The next prime is 252643367. The reversal of 252643347 is 743346252.

252643347 is a `hidden beast` number, since 2 + 5 + 2 + 643 + 3 + 4 + 7 = 666.

It is not a de Polignac number, because 252643347 - 2⁷ = 252643219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252643327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15097 + ... + 27077.

It is an arithmetic number, because the mean of its divisors is an integer number (12940560).

Almost surely, 2^252643347 is an apocalyptic number.

252643347 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

252643347 is a deficient number, since it is larger than the sum of its proper divisors (161454573).

252643347 is a wasteful number, since it uses less digits than its factorization.

252643347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12072 (or 12066 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 252643347 is about 15894.7584756737. The cubic root of 252643347 is about 632.1730176770.

Adding to 252643347 its reverse (743346252), we get a palindrome (995989599).

The spelling of 252643347 in words is "two hundred fifty-two million, six hundred forty-three thousand, three hundred forty-seven".