55161822 has 8 divisors (see below), whose sum is σ = 110323656. Its totient is φ = 18387272.

The previous prime is 55161809. The next prime is 55161823. The reversal of 55161822 is 22816155.

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

55161822 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 55161822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55161823) 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, 4596813 + ... + 4596824.

It is an arithmetic number, because the mean of its divisors is an integer number (13790457).

Almost surely, 2^55161822 is an apocalyptic number.

55161822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55161822 is a wasteful number, since it uses less digits than its factorization.

55161822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9193642.

The product of its digits is 4800, while the sum is 30.

The square root of 55161822 is about 7427.1005109666. The cubic root of 55161822 is about 380.6678514151.

Adding to 55161822 its reverse (22816155), we get a palindrome (77977977).

The spelling of 55161822 in words is "fifty-five million, one hundred sixty-one thousand, eight hundred twenty-two".