1155563207 has 4 divisors (see below), whose sum is σ = 1155631680. Its totient is φ = 1155494736.

The previous prime is 1155563177. The next prime is 1155563239. The reversal of 1155563207 is 7023655511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7023655511 = 41 ⋅171308671.

It is a cyclic number.

It is not a de Polignac number, because 1155563207 - 2²⁸ = 887127751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155553207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11018 + ... + 49320.

It is an arithmetic number, because the mean of its divisors is an integer number (288907920).

Almost surely, 2^1155563207 is an apocalyptic number.

1155563207 is a deficient number, since it is larger than the sum of its proper divisors (68473).

1155563207 is an equidigital number, since it uses as much as digits as its factorization.

1155563207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68472.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 1155563207 is about 33993.5759666441. The cubic root of 1155563207 is about 1049.3762605389.

The spelling of 1155563207 in words is "one billion, one hundred fifty-five million, five hundred sixty-three thousand, two hundred seven".