9955181 has 4 divisors (see below), whose sum is σ = 10010364. Its totient is φ = 9900000.

The previous prime is 9955177. The next prime is 9955189. The reversal of 9955181 is 1815599.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133225 + 9821956 = 365^2 + 3134^2 .

It is a cyclic number.

It is not a de Polignac number, because 9955181 - 2² = 9955177 is a prime.

It is a super-2 number, since 2×9955181² = 198211257485522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9955189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27320 + ... + 27681.

It is an arithmetic number, because the mean of its divisors is an integer number (2502591).

Almost surely, 2^9955181 is an apocalyptic number.

It is an amenable number.

9955181 is a deficient number, since it is larger than the sum of its proper divisors (55183).

9955181 is a wasteful number, since it uses less digits than its factorization.

9955181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55182.

The product of its digits is 16200, while the sum is 38.

The square root of 9955181 is about 3155.1831959492. The cubic root of 9955181 is about 215.1211215849.

The spelling of 9955181 in words is "nine million, nine hundred fifty-five thousand, one hundred eighty-one".