55215330511 has 8 divisors (see below), whose sum is σ = 60440489424. Its totient is φ = 50024435520.

The previous prime is 55215330509. The next prime is 55215330529. The reversal of 55215330511 is 11503351255.

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 55215330511 - 2¹ = 55215330509 is a prime.

It is a super-2 number, since 2×55215330511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55215330571) 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, 8562606 + ... + 8569051.

It is an arithmetic number, because the mean of its divisors is an integer number (7555061178).

Almost surely, 2^55215330511 is an apocalyptic number.

55215330511 is a deficient number, since it is larger than the sum of its proper divisors (5225158913).

55215330511 is a wasteful number, since it uses less digits than its factorization.

55215330511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17131961.

The product of its (nonzero) digits is 11250, while the sum is 31.

Adding to 55215330511 its reverse (11503351255), we get a palindrome (66718681766).

The spelling of 55215330511 in words is "fifty-five billion, two hundred fifteen million, three hundred thirty thousand, five hundred eleven".