1131665203 has 2 divisors, whose sum is σ = 1131665204. Its totient is φ = 1131665202.

The previous prime is 1131665191. The next prime is 1131665219. The reversal of 1131665203 is 3025661311.

It is a weak prime.

It is an emirp because it is prime and its reverse (3025661311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131665203 is a prime.

It is a super-2 number, since 2×1131665203² = 2561332263362062418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1131665233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565832601 + 565832602.

It is an arithmetic number, because the mean of its divisors is an integer number (565832602).

Almost surely, 2^1131665203 is an apocalyptic number.

1131665203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131665203 is an equidigital number, since it uses as much as digits as its factorization.

1131665203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1131665203 is about 33640.2319106156. The cubic root of 1131665203 is about 1042.0918212563.

The spelling of 1131665203 in words is "one billion, one hundred thirty-one million, six hundred sixty-five thousand, two hundred three".