253963805 has 32 divisors (see below), whose sum is σ = 321159168. Its totient is φ = 192628800.

The previous prime is 253963763. The next prime is 253963837. The reversal of 253963805 is 508369352.

It is not a de Polignac number, because 253963805 - 2¹⁶ = 253898269 is a prime.

It is a super-2 number, since 2×253963805² = 128995228500156050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1938590 + ... + 1938720.

It is an arithmetic number, because the mean of its divisors is an integer number (10036224).

Almost surely, 2^253963805 is an apocalyptic number.

It is an amenable number.

253963805 is a deficient number, since it is larger than the sum of its proper divisors (67195363).

253963805 is a wasteful number, since it uses less digits than its factorization.

253963805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 253963805 is about 15936.2418719094. The cubic root of 253963805 is about 633.2724698360.

The spelling of 253963805 in words is "two hundred fifty-three million, nine hundred sixty-three thousand, eight hundred five".