55231001 has 4 divisors (see below), whose sum is σ = 63121152. Its totient is φ = 47340852.

The previous prime is 55230953. The next prime is 55231009. The reversal of 55231001 is 10013255.

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 55231001 - 2²² = 51036697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55231009) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3945065 + ... + 3945078.

It is an arithmetic number, because the mean of its divisors is an integer number (15780288).

Almost surely, 2^55231001 is an apocalyptic number.

It is an amenable number.

55231001 is a deficient number, since it is larger than the sum of its proper divisors (7890151).

55231001 is an equidigital number, since it uses as much as digits as its factorization.

55231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7890150.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 55231001 is about 7431.7562527306. The cubic root of 55231001 is about 380.8269180747.

Adding to 55231001 its reverse (10013255), we get a palindrome (65244256).

The spelling of 55231001 in words is "fifty-five million, two hundred thirty-one thousand, one".