321387252 has 48 divisors (see below), whose sum is σ = 760815552. Its totient is φ = 105580800.

The previous prime is 321387239. The next prime is 321387259. The reversal of 321387252 is 252783123.

It is a super-2 number, since 2×321387252² = 206579531496223008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321387259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342528 + ... + 343464.

It is an arithmetic number, because the mean of its divisors is an integer number (15850324).

Almost surely, 2^321387252 is an apocalyptic number.

It is an amenable number.

321387252 is an abundant number, since it is smaller than the sum of its proper divisors (439428300).

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

321387252 is a wasteful number, since it uses less digits than its factorization.

321387252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328 (or 1326 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 321387252 is about 17927.2767591734. The cubic root of 321387252 is about 684.9773569513.

The spelling of 321387252 in words is "three hundred twenty-one million, three hundred eighty-seven thousand, two hundred fifty-two".