31061269 has 2 divisors, whose sum is σ = 31061270. Its totient is φ = 31061268.

The previous prime is 31061263. The next prime is 31061297. The reversal of 31061269 is 96216013.

It is an a-pointer prime, because the next prime (31061297) can be obtained adding 31061269 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18173169 + 12888100 = 4263^2 + 3590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31061269 is a prime.

It is a super-2 number, since 2×31061269² = 1929604863780722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31061263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15530634 + 15530635.

It is an arithmetic number, because the mean of its divisors is an integer number (15530635).

Almost surely, 2^31061269 is an apocalyptic number.

It is an amenable number.

31061269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31061269 is an equidigital number, since it uses as much as digits as its factorization.

31061269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31061269 is about 5573.2637655148. The cubic root of 31061269 is about 314.3448852287.

The spelling of 31061269 in words is "thirty-one million, sixty-one thousand, two hundred sixty-nine".