31422101 has 2 divisors, whose sum is σ = 31422102. Its totient is φ = 31422100.

The previous prime is 31422089. The next prime is 31422151. The reversal of 31422101 is 10122413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28633201 + 2788900 = 5351^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422101 - 2⁶ = 31422037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31422151) 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, 15711050 + 15711051.

It is an arithmetic number, because the mean of its divisors is an integer number (15711051).

Almost surely, 2^31422101 is an apocalyptic number.

It is an amenable number.

31422101 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422101 is an equidigital number, since it uses as much as digits as its factorization.

31422101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 31422101 is about 5605.5419898525. The cubic root of 31422101 is about 315.5574273668.

Adding to 31422101 its reverse (10122413), we get a palindrome (41544514).

The spelling of 31422101 in words is "thirty-one million, four hundred twenty-two thousand, one hundred one".