31421141 has 2 divisors, whose sum is σ = 31421142. Its totient is φ = 31421140.

The previous prime is 31421111. The next prime is 31421153. The reversal of 31421141 is 14112413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27520516 + 3900625 = 5246^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 31421141 - 2¹⁴ = 31404757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31421101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710570 + 15710571.

It is an arithmetic number, because the mean of its divisors is an integer number (15710571).

Almost surely, 2^31421141 is an apocalyptic number.

It is an amenable number.

31421141 is a deficient number, since it is larger than the sum of its proper divisors (1).

31421141 is an equidigital number, since it uses as much as digits as its factorization.

31421141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 31421141 is about 5605.4563596553. The cubic root of 31421141 is about 315.5542137241.

Adding to 31421141 its reverse (14112413), we get a palindrome (45533554).

The spelling of 31421141 in words is "thirty-one million, four hundred twenty-one thousand, one hundred forty-one".