163232431 has 4 divisors (see below), whose sum is σ = 163269952. Its totient is φ = 163194912.

The previous prime is 163232423. The next prime is 163232441. The reversal of 163232431 is 134232361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134232361 = 113 ⋅1187897.

It is a cyclic number.

It is not a de Polignac number, because 163232431 - 2³ = 163232423 is a prime.

It is a super-2 number, since 2×163232431² = 53289653060339522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163232396 and 163232405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163232411) 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, 11226 + ... + 21271.

It is an arithmetic number, because the mean of its divisors is an integer number (40817488).

Almost surely, 2^163232431 is an apocalyptic number.

163232431 is a deficient number, since it is larger than the sum of its proper divisors (37521).

163232431 is an equidigital number, since it uses as much as digits as its factorization.

163232431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37520.

The product of its digits is 2592, while the sum is 25.

The square root of 163232431 is about 12776.2447925828. The cubic root of 163232431 is about 546.5150794665.

Adding to 163232431 its reverse (134232361), we get a palindrome (297464792).

The spelling of 163232431 in words is "one hundred sixty-three million, two hundred thirty-two thousand, four hundred thirty-one".