31120153 has 2 divisors, whose sum is σ = 31120154. Its totient is φ = 31120152.

The previous prime is 31120121. The next prime is 31120163. The reversal of 31120153 is 35102113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16581184 + 14538969 = 4072^2 + 3813^2 .

It is an emirp because it is prime and its reverse (35102113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31120153 - 2⁵ = 31120121 is a prime.

It is not a weakly prime, because it can be changed into another prime (31120163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560076 + 15560077.

It is an arithmetic number, because the mean of its divisors is an integer number (15560077).

Almost surely, 2^31120153 is an apocalyptic number.

It is an amenable number.

31120153 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120153 is an equidigital number, since it uses as much as digits as its factorization.

31120153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 31120153 is about 5578.5439856651. The cubic root of 31120153 is about 314.5433982589.

Adding to 31120153 its reverse (35102113), we get a palindrome (66222266).

The spelling of 31120153 in words is "thirty-one million, one hundred twenty thousand, one hundred fifty-three".