163131436 has 12 divisors (see below), whose sum is σ = 307440112. Its totient is φ = 75291408.

The previous prime is 163131427. The next prime is 163131457. The reversal of 163131436 is 634131361.

163131436 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×163131436² = 53223730822844192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1568520 + ... + 1568623.

Almost surely, 2^163131436 is an apocalyptic number.

It is an amenable number.

163131436 is a deficient number, since it is larger than the sum of its proper divisors (144308676).

163131436 is a wasteful number, since it uses less digits than its factorization.

163131436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137160 (or 3137158 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

The square root of 163131436 is about 12772.2917285818. The cubic root of 163131436 is about 546.4023431320.

Adding to 163131436 its reverse (634131361), we get a palindrome (797262797).

The spelling of 163131436 in words is "one hundred sixty-three million, one hundred thirty-one thousand, four hundred thirty-six".