163431450 has 216 divisors, whose sum is σ = 545152608. Its totient is φ = 34369920.

The previous prime is 163431449. The next prime is 163431467. The reversal of 163431450 is 54134361.

163431450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 532197 + ... + 532503.

Almost surely, 2^163431450 is an apocalyptic number.

163431450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 163431450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272576304).

163431450 is an abundant number, since it is smaller than the sum of its proper divisors (381721158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163431450 is a wasteful number, since it uses less digits than its factorization.

163431450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 163431450 is about 12784.0310544053. The cubic root of 163431450 is about 546.7370997061.

The spelling of 163431450 in words is "one hundred sixty-three million, four hundred thirty-one thousand, four hundred fifty".