163965131 has 8 divisors (see below), whose sum is σ = 179150400. Its totient is φ = 148826440.

The previous prime is 163965077. The next prime is 163965157. The reversal of 163965131 is 131569361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163965131 - 2¹⁴ = 163948747 is a prime.

It is a super-2 number, since 2×163965131² = 53769128367694322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163965091 and 163965100.

It is not an unprimeable number, because it can be changed into a prime (163965161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4061 + ... + 18558.

It is an arithmetic number, because the mean of its divisors is an integer number (22393800).

Almost surely, 2^163965131 is an apocalyptic number.

163965131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

163965131 is the 6845-th centered heptagonal number.

163965131 is a deficient number, since it is larger than the sum of its proper divisors (15185269).

163965131 is a wasteful number, since it uses less digits than its factorization.

163965131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23289.

The product of its digits is 14580, while the sum is 35.

The square root of 163965131 is about 12804.8869967681. The cubic root of 163965131 is about 547.3315715242.

The spelling of 163965131 in words is "one hundred sixty-three million, nine hundred sixty-five thousand, one hundred thirty-one".