321612036 has 96 divisors (see below), whose sum is σ = 813189888. Its totient is φ = 98672640.

The previous prime is 321612019. The next prime is 321612043. The reversal of 321612036 is 630216123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321611997 and 321612015.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1097506 + ... + 1097798.

It is an arithmetic number, because the mean of its divisors is an integer number (8470728).

Almost surely, 2^321612036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321612036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406594944).

321612036 is an abundant number, since it is smaller than the sum of its proper divisors (491577852).

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

321612036 is a wasteful number, since it uses less digits than its factorization.

321612036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 321612036 is about 17933.5449925552. The cubic root of 321612036 is about 685.1370148783.

Adding to 321612036 its reverse (630216123), we get a palindrome (951828159).

The spelling of 321612036 in words is "three hundred twenty-one million, six hundred twelve thousand, thirty-six".