321323130 has 48 divisors (see below), whose sum is σ = 836511624. Its totient is φ = 85576320.

The previous prime is 321323083. The next prime is 321323141. The reversal of 321323130 is 31323123.

321323130 is a `hidden beast` number, since 321 + 32 + 313 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 320875569 + 447561 = 17913^2 + 669^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

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, 87940 + ... + 91520.

Almost surely, 2^321323130 is an apocalyptic number.

321323130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

321323130 is an abundant number, since it is smaller than the sum of its proper divisors (515188494).

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

321323130 is a wasteful number, since it uses less digits than its factorization.

321323130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591 (or 4588 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 321323130 is about 17925.4882778685. The cubic root of 321323130 is about 684.9317992021.

Adding to 321323130 its reverse (31323123), we get a palindrome (352646253).

The spelling of 321323130 in words is "three hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty".