326131506 has 48 divisors (see below), whose sum is σ = 737942400. Its totient is φ = 103963104.

The previous prime is 326131499. The next prime is 326131549. The reversal of 326131506 is 605131623.

326131506 is a `hidden beast` number, since 3 + 26 + 131 + 506 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 326131506.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52935 + ... + 58773.

It is an arithmetic number, because the mean of its divisors is an integer number (15373800).

Almost surely, 2^326131506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326131506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368971200).

326131506 is an abundant number, since it is smaller than the sum of its proper divisors (411810894).

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

326131506 is a wasteful number, since it uses less digits than its factorization.

326131506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5983 (or 5980 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 326131506 is about 18059.1114399352. Note that the first 3 decimals coincide. The cubic root of 326131506 is about 688.3314061053.

The spelling of 326131506 in words is "three hundred twenty-six million, one hundred thirty-one thousand, five hundred six".