252981667 has 4 divisors (see below), whose sum is σ = 257754960. Its totient is φ = 248208376.

The previous prime is 252981649. The next prime is 252981671. The reversal of 252981667 is 766189252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252981667 - 2¹⁹ = 252457379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252981647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2386567 + ... + 2386672.

It is an arithmetic number, because the mean of its divisors is an integer number (64438740).

Almost surely, 2^252981667 is an apocalyptic number.

252981667 is a deficient number, since it is larger than the sum of its proper divisors (4773293).

252981667 is an equidigital number, since it uses as much as digits as its factorization.

252981667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4773292.

The product of its digits is 362880, while the sum is 46.

The square root of 252981667 is about 15905.3974172292. The cubic root of 252981667 is about 632.4550771888.

The spelling of 252981667 in words is "two hundred fifty-two million, nine hundred eighty-one thousand, six hundred sixty-seven".