11551642031 has 2 divisors, whose sum is σ = 11551642032. Its totient is φ = 11551642030.

The previous prime is 11551642019. The next prime is 11551642049. The reversal of 11551642031 is 13024615511.

It is a weak prime.

It is an emirp because it is prime and its reverse (13024615511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11551642031 - 2¹⁸ = 11551379887 is a prime.

It is a super-2 number, since 2×11551642031² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 11551641985 and 11551642003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11551642331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5775821015 + 5775821016.

It is an arithmetic number, because the mean of its divisors is an integer number (5775821016).

Almost surely, 2^11551642031 is an apocalyptic number.

11551642031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11551642031 is an equidigital number, since it uses as much as digits as its factorization.

11551642031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 11551642031 in words is "eleven billion, five hundred fifty-one million, six hundred forty-two thousand, thirty-one".