31060321 has 6 divisors (see below), whose sum is σ = 31276322. Its totient is φ = 30845280.

The previous prime is 31060303. The next prime is 31060333. The reversal of 31060321 is 12306013.

It can be written as a sum of positive squares in only one way, i.e., 28998225 + 2062096 = 5385^2 + 1436^2 .

It is not a de Polignac number, because 31060321 - 2¹¹ = 31058273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31060295 and 31060304.

It is not an unprimeable number, because it can be changed into a prime (31060361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86340 + ... + 86698.

Almost surely, 2^31060321 is an apocalyptic number.

It is an amenable number.

31060321 is a deficient number, since it is larger than the sum of its proper divisors (216001).

31060321 is an frugal number, since it uses more digits than its factorization.

31060321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 600 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 31060321 is about 5573.1787159573. The cubic root of 31060321 is about 314.3416872269.

Adding to 31060321 its reverse (12306013), we get a palindrome (43366334).

The spelling of 31060321 in words is "thirty-one million, sixty thousand, three hundred twenty-one".