1115552531 has 2 divisors, whose sum is σ = 1115552532. Its totient is φ = 1115552530.

The previous prime is 1115552527. The next prime is 1115552539. The reversal of 1115552531 is 1352555111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1115552531 - 2² = 1115552527 is a prime.

It is a super-2 number, since 2×1115552531² = 2488914898841011922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1115552494 and 1115552503.

It is not a weakly prime, because it can be changed into another prime (1115552539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557776265 + 557776266.

It is an arithmetic number, because the mean of its divisors is an integer number (557776266).

Almost surely, 2^1115552531 is an apocalyptic number.

1115552531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115552531 is an equidigital number, since it uses as much as digits as its factorization.

1115552531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3750, while the sum is 29.

The square root of 1115552531 is about 33399.8881884356. Note that the first 3 decimals coincide. The cubic root of 1115552531 is about 1037.1223863314.

The spelling of 1115552531 in words is "one billion, one hundred fifteen million, five hundred fifty-two thousand, five hundred thirty-one".