111332531 has 2 divisors, whose sum is σ = 111332532. Its totient is φ = 111332530.

The previous prime is 111332513. The next prime is 111332539. The reversal of 111332531 is 135233111.

Together with previous prime (111332513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111332531 - 2¹⁴ = 111316147 is a prime.

It is a super-2 number, since 2×111332531² = 24789864917731922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111332539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55666265 + 55666266.

It is an arithmetic number, because the mean of its divisors is an integer number (55666266).

Almost surely, 2^111332531 is an apocalyptic number.

111332531 is a deficient number, since it is larger than the sum of its proper divisors (1).

111332531 is an equidigital number, since it uses as much as digits as its factorization.

111332531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 20.

The square root of 111332531 is about 10551.4231741505. The cubic root of 111332531 is about 481.0689876168.

Adding to 111332531 its reverse (135233111), we get a palindrome (246565642).

The spelling of 111332531 in words is "one hundred eleven million, three hundred thirty-two thousand, five hundred thirty-one".