55231445240 has 64 divisors (see below), whose sum is σ = 125166967200. Its totient is φ = 21933655552.

The previous prime is 55231445237. The next prime is 55231445279. The reversal of 55231445240 is 4254413255.

It is a self number, because there is not a number n which added to its sum of digits gives 55231445240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4669574 + ... + 4681386.

Almost surely, 2^55231445240 is an apocalyptic number.

It is an amenable number.

55231445240 is an abundant number, since it is smaller than the sum of its proper divisors (69935521960).

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

55231445240 is a wasteful number, since it uses less digits than its factorization.

55231445240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12656 (or 12652 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 55231445240 its reverse (4254413255), we get a palindrome (59485858495).

The spelling of 55231445240 in words is "fifty-five billion, two hundred thirty-one million, four hundred forty-five thousand, two hundred forty".