55161001 has 4 divisors (see below), whose sum is σ = 63041152. Its totient is φ = 47280852.

The previous prime is 55160981. The next prime is 55161011. The reversal of 55161001 is 10016155.

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 a cyclic number.

It is not a de Polignac number, because 55161001 - 2¹⁵ = 55128233 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 55161001.

It is not an unprimeable number, because it can be changed into a prime (55161011) 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, 3940065 + ... + 3940078.

It is an arithmetic number, because the mean of its divisors is an integer number (15760288).

Almost surely, 2^55161001 is an apocalyptic number.

It is an amenable number.

55161001 is a deficient number, since it is larger than the sum of its proper divisors (7880151).

55161001 is an equidigital number, since it uses as much as digits as its factorization.

55161001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7880150.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 55161001 is about 7427.0452402015. The cubic root of 55161001 is about 380.6659628514.

Adding to 55161001 its reverse (10016155), we get a palindrome (65177156).

The spelling of 55161001 in words is "fifty-five million, one hundred sixty-one thousand, one".