1163228561 has 8 divisors (see below), whose sum is σ = 1298488224. Its totient is φ = 1032887520.

The previous prime is 1163228551. The next prime is 1163228567. The reversal of 1163228561 is 1658223611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1163228561 is a prime.

It is a super-2 number, since 2×1163228561² = 2706201370252261442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1163228567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229156 + ... + 1230101.

It is an arithmetic number, because the mean of its divisors is an integer number (162311028).

Almost surely, 2^1163228561 is an apocalyptic number.

1163228561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1163228561 is a deficient number, since it is larger than the sum of its proper divisors (135259663).

1163228561 is a wasteful number, since it uses less digits than its factorization.

1163228561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459311.

The product of its digits is 17280, while the sum is 35.

The square root of 1163228561 is about 34106.1367058774. The cubic root of 1163228561 is about 1051.6914720381.

The spelling of 1163228561 in words is "one billion, one hundred sixty-three million, two hundred twenty-eight thousand, five hundred sixty-one".