10881561 has 8 divisors (see below), whose sum is σ = 14637600. Its totient is φ = 7189952.

The previous prime is 10881551. The next prime is 10881569. The reversal of 10881561 is 16518801.

It is a happy number.

10881561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 10881561 - 2¹⁵ = 10848793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10881569) 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, 15711 + ... + 16388.

It is an arithmetic number, because the mean of its divisors is an integer number (1829700).

Almost surely, 2^10881561 is an apocalyptic number.

It is an amenable number.

10881561 is a deficient number, since it is larger than the sum of its proper divisors (3756039).

10881561 is a wasteful number, since it uses less digits than its factorization.

10881561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32215.

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 10881561 is about 3298.7211158266. The cubic root of 10881561 is about 221.5969270753.

The spelling of 10881561 in words is "ten million, eight hundred eighty-one thousand, five hundred sixty-one".