253243634 has 16 divisors (see below), whose sum is σ = 444721536. Its totient is φ = 105885600.

The previous prime is 253243607. The next prime is 253243657. The reversal of 253243634 is 436342352.

It is a self number, because there is not a number n which added to its sum of digits gives 253243634.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 220022 + ... + 221169.

It is an arithmetic number, because the mean of its divisors is an integer number (27795096).

Almost surely, 2^253243634 is an apocalyptic number.

253243634 is a deficient number, since it is larger than the sum of its proper divisors (191477902).

253243634 is a wasteful number, since it uses less digits than its factorization.

253243634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441241.

The product of its digits is 51840, while the sum is 32.

The square root of 253243634 is about 15913.6304468842. The cubic root of 253243634 is about 632.6733080261.

Adding to 253243634 its reverse (436342352), we get a palindrome (689585986).

The spelling of 253243634 in words is "two hundred fifty-three million, two hundred forty-three thousand, six hundred thirty-four".