55161633 has 4 divisors (see below), whose sum is σ = 73548848. Its totient is φ = 36774420.

The previous prime is 55161619. The next prime is 55161641. The reversal of 55161633 is 33616155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55161633 - 2⁸ = 55161377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55161633.

It is not an unprimeable number, because it can be changed into a prime (55161653) 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, 9193603 + ... + 9193608.

It is an arithmetic number, because the mean of its divisors is an integer number (18387212).

Almost surely, 2^55161633 is an apocalyptic number.

It is an amenable number.

55161633 is a deficient number, since it is larger than the sum of its proper divisors (18387215).

55161633 is a wasteful number, since it uses less digits than its factorization.

55161633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18387214.

The product of its digits is 8100, while the sum is 30.

The square root of 55161633 is about 7427.0877872824. The cubic root of 55161633 is about 380.6674166561.

Adding to 55161633 its reverse (33616155), we get a palindrome (88777788).

The spelling of 55161633 in words is "fifty-five million, one hundred sixty-one thousand, six hundred thirty-three".