163240431 has 8 divisors (see below), whose sum is σ = 220719744. Its totient is φ = 107294040.

The previous prime is 163240423. The next prime is 163240459. The reversal of 163240431 is 134042361.

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

It is not a de Polignac number, because 163240431 - 2³ = 163240423 is a prime.

It is a super-2 number, since 2×163240431² = 53294876626131522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163240421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382981 + ... + 383406.

It is an arithmetic number, because the mean of its divisors is an integer number (27589968).

Almost surely, 2^163240431 is an apocalyptic number.

163240431 is a deficient number, since it is larger than the sum of its proper divisors (57479313).

163240431 is an equidigital number, since it uses as much as digits as its factorization.

163240431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766461.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 163240431 is about 12776.5578697864. The cubic root of 163240431 is about 546.5240075314.

Adding to 163240431 its reverse (134042361), we get a palindrome (297282792).

The spelling of 163240431 in words is "one hundred sixty-three million, two hundred forty thousand, four hundred thirty-one".