31341321 has 24 divisors (see below), whose sum is σ = 49667904. Its totient is φ = 18886560.

The previous prime is 31341301. The next prime is 31341361. The reversal of 31341321 is 12314313.

31341321 is a `hidden beast` number, since 3 + 1 + 341 + 321 = 666.

It is not a de Polignac number, because 31341321 - 2¹⁰ = 31340297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31341294 and 31341303.

It is not an unprimeable number, because it can be changed into a prime (31341301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18700 + ... + 20306.

It is an arithmetic number, because the mean of its divisors is an integer number (2069496).

Almost surely, 2^31341321 is an apocalyptic number.

It is an amenable number.

31341321 is a deficient number, since it is larger than the sum of its proper divisors (18326583).

31341321 is a wasteful number, since it uses less digits than its factorization.

31341321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1818 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 31341321 is about 5598.3319837252. The cubic root of 31341321 is about 315.2867834220.

Adding to 31341321 its reverse (12314313), we get a palindrome (43655634).

The spelling of 31341321 in words is "thirty-one million, three hundred forty-one thousand, three hundred twenty-one".