163361431 has 4 divisors (see below), whose sum is σ = 163541664. Its totient is φ = 163181200.

The previous prime is 163361417. The next prime is 163361453. The reversal of 163361431 is 134163361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134163361 = 709 ⋅189229.

It is a cyclic number.

It is not a de Polignac number, because 163361431 - 2²³ = 154972823 is a prime.

It is a super-2 number, since 2×163361431² = 53373914276735522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163361431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163361491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88750 + ... + 90571.

It is an arithmetic number, because the mean of its divisors is an integer number (40885416).

Almost surely, 2^163361431 is an apocalyptic number.

163361431 is a deficient number, since it is larger than the sum of its proper divisors (180233).

163361431 is an equidigital number, since it uses as much as digits as its factorization.

163361431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180232.

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

The square root of 163361431 is about 12781.2922273141. The cubic root of 163361431 is about 546.6590089564.

The spelling of 163361431 in words is "one hundred sixty-three million, three hundred sixty-one thousand, four hundred thirty-one".