10561998 has 16 divisors (see below), whose sum is σ = 22366800. Its totient is φ = 3313536.

The previous prime is 10561987. The next prime is 10562009. The reversal of 10561998 is 89916501.

It is an interprime number because it is at equal distance from previous prime (10561987) and next prime (10562009).

It is a super-2 number, since 2×10561998² = 223111603504008, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51673 + ... + 51876.

It is an arithmetic number, because the mean of its divisors is an integer number (1397925).

Almost surely, 2^10561998 is an apocalyptic number.

10561998 is an abundant number, since it is smaller than the sum of its proper divisors (11804802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10561998 is a wasteful number, since it uses less digits than its factorization.

10561998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103571.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 10561998 is about 3249.9227683131. The cubic root of 10561998 is about 219.4060978958.

The spelling of 10561998 in words is "ten million, five hundred sixty-one thousand, nine hundred ninety-eight".