163256238 has 24 divisors (see below), whose sum is σ = 357372288. Its totient is φ = 53857152.

The previous prime is 163256237. The next prime is 163256257. The reversal of 163256238 is 832652361.

It is a happy number.

163256238 is a `hidden beast` number, since 1 + 6 + 3 + 25 + 623 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163256237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45006 + ... + 48497.

It is an arithmetic number, because the mean of its divisors is an integer number (14890512).

Almost surely, 2^163256238 is an apocalyptic number.

163256238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

163256238 is an abundant number, since it is smaller than the sum of its proper divisors (194116050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163256238 is a wasteful number, since it uses less digits than its factorization.

163256238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93608 (or 93605 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 163256238 is about 12777.1764486525. The cubic root of 163256238 is about 546.5416474141.

The spelling of 163256238 in words is "one hundred sixty-three million, two hundred fifty-six thousand, two hundred thirty-eight".