11356531 has 2 divisors, whose sum is σ = 11356532. Its totient is φ = 11356530.

The previous prime is 11356529. The next prime is 11356591. The reversal of 11356531 is 13565311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11356531 - 2¹ = 11356529 is a prime.

It is a super-2 number, since 2×11356531² = 257941592707922, which contains 22 as substring.

Together with 11356529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11356496 and 11356505.

It is not a weakly prime, because it can be changed into another prime (11356591) 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, 5678265 + 5678266.

It is an arithmetic number, because the mean of its divisors is an integer number (5678266).

Almost surely, 2^11356531 is an apocalyptic number.

11356531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11356531 is an equidigital number, since it uses as much as digits as its factorization.

11356531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 25.

The square root of 11356531 is about 3369.9452517808. The cubic root of 11356531 is about 224.7752884084.

It can be divided in two parts, 113 and 56531, that added together give a square (56644 = 238²).

The spelling of 11356531 in words is "eleven million, three hundred fifty-six thousand, five hundred thirty-one".