31131053 has 2 divisors, whose sum is σ = 31131054. Its totient is φ = 31131052.

The previous prime is 31131041. The next prime is 31131077. The reversal of 31131053 is 35013113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21409129 + 9721924 = 4627^2 + 3118^2 .

It is an emirp because it is prime and its reverse (35013113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31131053 - 2⁶ = 31130989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31131553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565526 + 15565527.

It is an arithmetic number, because the mean of its divisors is an integer number (15565527).

Almost surely, 2^31131053 is an apocalyptic number.

It is an amenable number.

31131053 is a deficient number, since it is larger than the sum of its proper divisors (1).

31131053 is an equidigital number, since it uses as much as digits as its factorization.

31131053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 31131053 is about 5579.5208575647. The cubic root of 31131053 is about 314.5801174746.

Adding to 31131053 its reverse (35013113), we get a palindrome (66144166).

The spelling of 31131053 in words is "thirty-one million, one hundred thirty-one thousand, fifty-three".