1100551161 has 16 divisors (see below), whose sum is σ = 1480679424. Its totient is φ = 727092624.

The previous prime is 1100551141. The next prime is 1100551171. The reversal of 1100551161 is 1611550011.

It is a happy number.

It is not a de Polignac number, because 1100551161 - 2⁵ = 1100551129 is a prime.

It is a super-2 number, since 2×1100551161² = 2422425715956895842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1100551121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148240 + ... + 155486.

It is an arithmetic number, because the mean of its divisors is an integer number (92542464).

Almost surely, 2^1100551161 is an apocalyptic number.

It is an amenable number.

1100551161 is a deficient number, since it is larger than the sum of its proper divisors (380128263).

1100551161 is a wasteful number, since it uses less digits than its factorization.

1100551161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7700.

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 1100551161 is about 33174.5559276986. Note that the first 3 decimals coincide. The cubic root of 1100551161 is about 1032.4524965296.

The spelling of 1100551161 in words is "one billion, one hundred million, five hundred fifty-one thousand, one hundred sixty-one".