55011204521 has 32 divisors (see below), whose sum is σ = 68146848000. Its totient is φ = 43242667776.

The previous prime is 55011204503. The next prime is 55011204533. The reversal of 55011204521 is 12540211055.

It is not a de Polignac number, because 55011204521 - 2¹⁰ = 55011203497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55011204571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15720230 + ... + 15723728.

It is an arithmetic number, because the mean of its divisors is an integer number (2129589000).

Almost surely, 2^55011204521 is an apocalyptic number.

It is an amenable number.

55011204521 is a deficient number, since it is larger than the sum of its proper divisors (13135643479).

55011204521 is a wasteful number, since it uses less digits than its factorization.

55011204521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4593.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 55011204521 its reverse (12540211055), we get a palindrome (67551415576).

The spelling of 55011204521 in words is "fifty-five billion, eleven million, two hundred four thousand, five hundred twenty-one".