55731001 has 4 divisors (see below), whose sum is σ = 58154112. Its totient is φ = 53307892.

The previous prime is 55730993. The next prime is 55731007. The reversal of 55731001 is 10013755.

55731001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55731001 - 2³ = 55730993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55731007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211521 + ... + 1211566.

It is an arithmetic number, because the mean of its divisors is an integer number (14538528).

Almost surely, 2^55731001 is an apocalyptic number.

It is an amenable number.

55731001 is a deficient number, since it is larger than the sum of its proper divisors (2423111).

55731001 is a wasteful number, since it uses less digits than its factorization.

55731001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423110.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 55731001 is about 7465.3198859794. The cubic root of 55731001 is about 381.9726618960.

Adding to 55731001 its reverse (10013755), we get a palindrome (65744756).

The spelling of 55731001 in words is "fifty-five million, seven hundred thirty-one thousand, one".