163250405 has 8 divisors (see below), whose sum is σ = 207424152. Its totient is φ = 122917888.

The previous prime is 163250387. The next prime is 163250407. The reversal of 163250405 is 504052361.

It can be written as a sum of positive squares in 4 ways, for example, as 39551521 + 123698884 = 6289^2 + 11122^2 .

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

It is not a de Polignac number, because 163250405 - 2⁶ = 163250341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163250407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960212 + ... + 960381.

It is an arithmetic number, because the mean of its divisors is an integer number (25928019).

Almost surely, 2^163250405 is an apocalyptic number.

It is an amenable number.

163250405 is a deficient number, since it is larger than the sum of its proper divisors (44173747).

163250405 is a wasteful number, since it uses less digits than its factorization.

163250405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920615.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 163250405 is about 12776.9481880455. The cubic root of 163250405 is about 546.5351381878.

The spelling of 163250405 in words is "one hundred sixty-three million, two hundred fifty thousand, four hundred five".