321260016 has 160 divisors (see below), whose sum is σ = 1095787008. Its totient is φ = 78520320.

The previous prime is 321259963. The next prime is 321260047. The reversal of 321260016 is 610062123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 321259974 and 321260001.

It is a congruent number.

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, 60276 + ... + 65388.

Almost surely, 2^321260016 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 321260016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547893504).

321260016 is an abundant number, since it is smaller than the sum of its proper divisors (774526992).

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

321260016 is a wasteful number, since it uses less digits than its factorization.

321260016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5159 (or 5153 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 321260016 is about 17923.7277372761. The cubic root of 321260016 is about 684.8869517031.

The spelling of 321260016 in words is "three hundred twenty-one million, two hundred sixty thousand, sixteen".