111663542531 has 2 divisors, whose sum is σ = 111663542532. Its totient is φ = 111663542530.

The previous prime is 111663542483. The next prime is 111663542563. The reversal of 111663542531 is 135245366111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111663542531 - 2¹⁸ = 111663280387 is a prime.

It is a super-2 number, since 2×111663542531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111663541531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55831771265 + 55831771266.

It is an arithmetic number, because the mean of its divisors is an integer number (55831771266).

Almost surely, 2^111663542531 is an apocalyptic number.

111663542531 is a deficient number, since it is larger than the sum of its proper divisors (1).

111663542531 is an equidigital number, since it uses as much as digits as its factorization.

111663542531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The spelling of 111663542531 in words is "one hundred eleven billion, six hundred sixty-three million, five hundred forty-two thousand, five hundred thirty-one".