253288478 has 4 divisors (see below), whose sum is σ = 379932720. Its totient is φ = 126644238.

The previous prime is 253288439. The next prime is 253288481. The reversal of 253288478 is 874882352.

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

It is a Curzon number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 63322118 + ... + 63322121.

It is an arithmetic number, because the mean of its divisors is an integer number (94983180).

Almost surely, 2^253288478 is an apocalyptic number.

253288478 is a deficient number, since it is larger than the sum of its proper divisors (126644242).

253288478 is a wasteful number, since it uses less digits than its factorization.

253288478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126644241.

The product of its digits is 860160, while the sum is 47.

The square root of 253288478 is about 15915.0393653299. The cubic root of 253288478 is about 632.7106500998.

The spelling of 253288478 in words is "two hundred fifty-three million, two hundred eighty-eight thousand, four hundred seventy-eight".