113531557 has 2 divisors, whose sum is σ = 113531558. Its totient is φ = 113531556.

The previous prime is 113531533. The next prime is 113531563. The reversal of 113531557 is 755135311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111218116 + 2313441 = 10546^2 + 1521^2 .

It is a cyclic number.

It is not a de Polignac number, because 113531557 - 2¹¹ = 113529509 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113531357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56765778 + 56765779.

It is an arithmetic number, because the mean of its divisors is an integer number (56765779).

Almost surely, 2^113531557 is an apocalyptic number.

It is an amenable number.

113531557 is a deficient number, since it is larger than the sum of its proper divisors (1).

113531557 is an equidigital number, since it uses as much as digits as its factorization.

113531557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7875, while the sum is 31.

The square root of 113531557 is about 10655.1188167941. The cubic root of 113531557 is about 484.2156976911.

Adding to 113531557 its reverse (755135311), we get a palindrome (868666868).

The spelling of 113531557 in words is "one hundred thirteen million, five hundred thirty-one thousand, five hundred fifty-seven".