11585139431 has 2 divisors, whose sum is σ = 11585139432. Its totient is φ = 11585139430.

The previous prime is 11585139427. The next prime is 11585139437. The reversal of 11585139431 is 13493158511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11585139431 - 2² = 11585139427 is a prime.

It is a super-2 number, since 2×11585139431² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11585139437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5792569715 + 5792569716.

It is an arithmetic number, because the mean of its divisors is an integer number (5792569716).

Almost surely, 2^11585139431 is an apocalyptic number.

11585139431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11585139431 is an equidigital number, since it uses as much as digits as its factorization.

11585139431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The spelling of 11585139431 in words is "eleven billion, five hundred eighty-five million, one hundred thirty-nine thousand, four hundred thirty-one".