1155513601 has 4 divisors (see below), whose sum is σ = 1260560304. Its totient is φ = 1050466900.

The previous prime is 1155513553. The next prime is 1155513607. The reversal of 1155513601 is 1063155511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1063155511 = 11 ⋅96650501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155513601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1155513601.

It is not an unprimeable number, because it can be changed into a prime (1155513607) 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, 52523335 + ... + 52523356.

It is an arithmetic number, because the mean of its divisors is an integer number (315140076).

Almost surely, 2^1155513601 is an apocalyptic number.

1155513601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1155513601 is a deficient number, since it is larger than the sum of its proper divisors (105046703).

1155513601 is a wasteful number, since it uses less digits than its factorization.

1155513601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105046702.

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 1155513601 is about 33992.8463209541. The cubic root of 1155513601 is about 1049.3612444545.

The spelling of 1155513601 in words is "one billion, one hundred fifty-five million, five hundred thirteen thousand, six hundred one".