31468321 has 4 divisors (see below), whose sum is σ = 31537044. Its totient is φ = 31399600.

The previous prime is 31468319. The next prime is 31468331. The reversal of 31468321 is 12386413.

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 3748096 + 27720225 = 1936^2 + 5265^2 .

It is a cyclic number.

It is not a de Polignac number, because 31468321 - 2¹ = 31468319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31468321.

It is not an unprimeable number, because it can be changed into a prime (31468331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33670 + ... + 34591.

It is an arithmetic number, because the mean of its divisors is an integer number (7884261).

Almost surely, 2^31468321 is an apocalyptic number.

It is an amenable number.

31468321 is a deficient number, since it is larger than the sum of its proper divisors (68723).

31468321 is an equidigital number, since it uses as much as digits as its factorization.

31468321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68722.

The product of its digits is 3456, while the sum is 28.

The square root of 31468321 is about 5609.6631806197. The cubic root of 31468321 is about 315.7120734961.

It can be divided in two parts, 314 and 68321, that added together give a triangular number (68635 = T₃₇₀).

The spelling of 31468321 in words is "thirty-one million, four hundred sixty-eight thousand, three hundred twenty-one".