31026161 has 2 divisors, whose sum is σ = 31026162. Its totient is φ = 31026160.

The previous prime is 31026119. The next prime is 31026181. The reversal of 31026161 is 16162013.

It is an a-pointer prime, because the next prime (31026181) can be obtained adding 31026161 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30250000 + 776161 = 5500^2 + 881^2 .

It is a cyclic number.

It is not a de Polignac number, because 31026161 - 2⁶ = 31026097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31026181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15513080 + 15513081.

It is an arithmetic number, because the mean of its divisors is an integer number (15513081).

Almost surely, 2^31026161 is an apocalyptic number.

It is an amenable number.

31026161 is a deficient number, since it is larger than the sum of its proper divisors (1).

31026161 is an equidigital number, since it uses as much as digits as its factorization.

31026161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 31026161 is about 5570.1131945410. The cubic root of 31026161 is about 314.2264077685.

Adding to 31026161 its reverse (16162013), we get a palindrome (47188174).

The spelling of 31026161 in words is "thirty-one million, twenty-six thousand, one hundred sixty-one".