55000135531 has 8 divisors (see below), whose sum is σ = 60146852400. Its totient is φ = 49877869440.

The previous prime is 55000135511. The next prime is 55000135549. The reversal of 55000135531 is 13553100055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55000135531 - 2⁵ = 55000135499 is a prime.

It is a super-2 number, since 2×55000135531² (a number of 22 digits) contains 22 as substring.

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 55000135531.

It is not an unprimeable number, because it can be changed into a prime (55000135511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6107986 + ... + 6116983.

It is an arithmetic number, because the mean of its divisors is an integer number (7518356550).

Almost surely, 2^55000135531 is an apocalyptic number.

55000135531 is a deficient number, since it is larger than the sum of its proper divisors (5146716869).

55000135531 is a wasteful number, since it uses less digits than its factorization.

55000135531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12225389.

The product of its (nonzero) digits is 5625, while the sum is 28.

Adding to 55000135531 its reverse (13553100055), we get a palindrome (68553235586).

The spelling of 55000135531 in words is "fifty-five billion, one hundred thirty-five thousand, five hundred thirty-one".