326661131 has 4 divisors (see below), whose sum is σ = 331262064. Its totient is φ = 322060200.

The previous prime is 326661109. The next prime is 326661149. The reversal of 326661131 is 131166623.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-326661131 is a prime.

It is a super-3 number, since 3×326661131³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 326661094 and 326661103.

It is not an unprimeable number, because it can be changed into a prime (326661031) 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, 2300360 + ... + 2300501.

It is an arithmetic number, because the mean of its divisors is an integer number (82815516).

Almost surely, 2^326661131 is an apocalyptic number.

326661131 is a deficient number, since it is larger than the sum of its proper divisors (4600933).

326661131 is an equidigital number, since it uses as much as digits as its factorization.

326661131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4600932.

The product of its digits is 3888, while the sum is 29.

The square root of 326661131 is about 18073.7691420467. The cubic root of 326661131 is about 688.7038124809.

The spelling of 326661131 in words is "three hundred twenty-six million, six hundred sixty-one thousand, one hundred thirty-one".