31321441 has 2 divisors, whose sum is σ = 31321442. Its totient is φ = 31321440.

The previous prime is 31321427. The next prime is 31321447. The reversal of 31321441 is 14412313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16851025 + 14470416 = 4105^2 + 3804^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321441 - 2⁷ = 31321313 is a prime.

It is not a weakly prime, because it can be changed into another prime (31321447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660720 + 15660721.

It is an arithmetic number, because the mean of its divisors is an integer number (15660721).

Almost surely, 2^31321441 is an apocalyptic number.

It is an amenable number.

31321441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321441 is an equidigital number, since it uses as much as digits as its factorization.

31321441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 19.

The square root of 31321441 is about 5596.5561732194. The cubic root of 31321441 is about 315.2201065156.

Adding to 31321441 its reverse (14412313), we get a palindrome (45733754).

The spelling of 31321441 in words is "thirty-one million, three hundred twenty-one thousand, four hundred forty-one".