11131250309 has 2 divisors, whose sum is σ = 11131250310. Its totient is φ = 11131250308.

The previous prime is 11131250287. The next prime is 11131250357. The reversal of 11131250309 is 90305213111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8210172100 + 2921078209 = 90610^2 + 54047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131250309 is a prime.

It is a super-2 number, since 2×11131250309² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11131250369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565625154 + 5565625155.

It is an arithmetic number, because the mean of its divisors is an integer number (5565625155).

Almost surely, 2^11131250309 is an apocalyptic number.

It is an amenable number.

11131250309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131250309 is an equidigital number, since it uses as much as digits as its factorization.

11131250309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The spelling of 11131250309 in words is "eleven billion, one hundred thirty-one million, two hundred fifty thousand, three hundred nine".