31324145 has 4 divisors (see below), whose sum is σ = 37588980. Its totient is φ = 25059312.

The previous prime is 31324133. The next prime is 31324187. The reversal of 31324145 is 54142313.

31324145 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8014561 + 23309584 = 2831^2 + 4828^2 .

It is a cyclic number.

It is not a de Polignac number, because 31324145 - 2⁸ = 31323889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31324145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3132410 + ... + 3132419.

It is an arithmetic number, because the mean of its divisors is an integer number (9397245).

Almost surely, 2^31324145 is an apocalyptic number.

It is an amenable number.

31324145 is a deficient number, since it is larger than the sum of its proper divisors (6264835).

31324145 is an equidigital number, since it uses as much as digits as its factorization.

31324145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6264834.

The product of its digits is 1440, while the sum is 23.

The square root of 31324145 is about 5596.7977451396. The cubic root of 31324145 is about 315.2291773056.

Adding to 31324145 its reverse (54142313), we get a palindrome (85466458).

The spelling of 31324145 in words is "thirty-one million, three hundred twenty-four thousand, one hundred forty-five".