55030211521 has 8 divisors (see below), whose sum is σ = 56389536000. Its totient is φ = 53671702560.

The previous prime is 55030211477. The next prime is 55030211543. The reversal of 55030211521 is 12511203055.

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 55030211521 - 2⁹ = 55030211009 is a prime.

It is a super-2 number, since 2×55030211521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55030211021) 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, 66121 + ... + 338278.

It is an arithmetic number, because the mean of its divisors is an integer number (7048692000).

Almost surely, 2^55030211521 is an apocalyptic number.

It is an amenable number.

55030211521 is a deficient number, since it is larger than the sum of its proper divisors (1359324479).

55030211521 is a wasteful number, since it uses less digits than its factorization.

55030211521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407759.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 55030211521 its reverse (12511203055), we get a palindrome (67541414576).

The spelling of 55030211521 in words is "fifty-five billion, thirty million, two hundred eleven thousand, five hundred twenty-one".