1100561631 has 48 divisors (see below), whose sum is σ = 1630661760. Its totient is φ = 659767680.

The previous prime is 1100561617. The next prime is 1100561639. The reversal of 1100561631 is 1361650011.

It is not a de Polignac number, because 1100561631 - 2⁵ = 1100561599 is a prime.

It is a super-2 number, since 2×1100561631² = 2422471807258760322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100561639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6080361 + ... + 6080541.

It is an arithmetic number, because the mean of its divisors is an integer number (33972120).

Almost surely, 2^1100561631 is an apocalyptic number.

1100561631 is a deficient number, since it is larger than the sum of its proper divisors (530100129).

1100561631 is a wasteful number, since it uses less digits than its factorization.

1100561631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1100561631 is about 33174.7137289834. The cubic root of 1100561631 is about 1032.4557705689.

The spelling of 1100561631 in words is "one billion, one hundred million, five hundred sixty-one thousand, six hundred thirty-one".