55603440031 has 4 divisors (see below), whose sum is σ = 55605874032. Its totient is φ = 55601006032.

The previous prime is 55603440023. The next prime is 55603440059. The reversal of 55603440031 is 13004430655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55603440031 - 2³ = 55603440023 is a prime.

It is a super-2 number, since 2×55603440031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55603439975 and 55603440002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55603440731) 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, 1182406 + ... + 1228531.

It is an arithmetic number, because the mean of its divisors is an integer number (13901468508).

Almost surely, 2^55603440031 is an apocalyptic number.

55603440031 is a deficient number, since it is larger than the sum of its proper divisors (2434001).

55603440031 is a wasteful number, since it uses less digits than its factorization.

55603440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434000.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 55603440031 its reverse (13004430655), we get a palindrome (68607870686).

The spelling of 55603440031 in words is "fifty-five billion, six hundred three million, four hundred forty thousand, thirty-one".