1115206157 has 6 divisors (see below), whose sum is σ = 1207590282. Its totient is φ = 1029420912.

The previous prime is 1115206151. The next prime is 1115206189. The reversal of 1115206157 is 7516025111.

It can be written as a sum of positive squares in 3 ways, for example, as 4583881 + 1110622276 = 2141^2 + 33326^2 .

It is not a de Polignac number, because 1115206157 - 2²⁴ = 1098428941 is a prime.

It is a super-2 number, since 2×1115206157² = 2487369545221417298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115206151) 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 in 5 ways as a sum of consecutive naturals, for example, 3299258 + ... + 3299595.

It is an arithmetic number, because the mean of its divisors is an integer number (201265047).

Almost surely, 2^1115206157 is an apocalyptic number.

It is an amenable number.

1115206157 is a deficient number, since it is larger than the sum of its proper divisors (92384125).

1115206157 is an equidigital number, since it uses as much as digits as its factorization.

1115206157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6598879 (or 6598866 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 29.

The square root of 1115206157 is about 33394.7025289940. The cubic root of 1115206157 is about 1037.0150346212.

The spelling of 1115206157 in words is "one billion, one hundred fifteen million, two hundred six thousand, one hundred fifty-seven".