111013531 has 2 divisors, whose sum is σ = 111013532. Its totient is φ = 111013530.

The previous prime is 111013501. The next prime is 111013547. The reversal of 111013531 is 135310111.

It is an a-pointer prime, because the next prime (111013547) can be obtained adding 111013531 to its sum of digits (16).

It is a strong prime.

It is an emirp because it is prime and its reverse (135310111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111013531 - 2⁵ = 111013499 is a prime.

It is a super-2 number, since 2×111013531² = 24648008130175922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111013501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506765 + 55506766.

It is an arithmetic number, because the mean of its divisors is an integer number (55506766).

Almost surely, 2^111013531 is an apocalyptic number.

111013531 is a deficient number, since it is larger than the sum of its proper divisors (1).

111013531 is an equidigital number, since it uses as much as digits as its factorization.

111013531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 111013531 is about 10536.2958861262. The cubic root of 111013531 is about 480.6090806769.

Adding to 111013531 its reverse (135310111), we get a palindrome (246323642).

It can be divided in two parts, 1110 and 13531, that added together give a palindrome (14641).

The spelling of 111013531 in words is "one hundred eleven million, thirteen thousand, five hundred thirty-one".