321313136 has 40 divisors (see below), whose sum is σ = 638798400. Its totient is φ = 156505856.

The previous prime is 321313133. The next prime is 321313147. The reversal of 321313136 is 631313123.

It is a happy number.

It is a super-4 number, since 4×321313136⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321313133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125081 + ... + 127623.

It is an arithmetic number, because the mean of its divisors is an integer number (15969960).

Almost surely, 2^321313136 is an apocalyptic number.

It is an amenable number.

321313136 is a deficient number, since it is larger than the sum of its proper divisors (317485264).

321313136 is a wasteful number, since it uses less digits than its factorization.

321313136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753 (or 2747 counting only the distinct ones).

The product of its digits is 972, while the sum is 23.

The square root of 321313136 is about 17925.2095106306. The cubic root of 321313136 is about 684.9246980644.

Adding to 321313136 its reverse (631313123), we get a palindrome (952626259).

The spelling of 321313136 in words is "three hundred twenty-one million, three hundred thirteen thousand, one hundred thirty-six".