55020621213 has 12 divisors (see below), whose sum is σ = 79481638080. Its totient is φ = 36676995336.

The previous prime is 55020621181. The next prime is 55020621221. The reversal of 55020621213 is 31212602055.

It is a happy number.

55020621213 is a `hidden beast` number, since 5 + 5 + 0 + 20 + 621 + 2 + 13 = 666.

It is not a de Polignac number, because 55020621213 - 2⁵ = 55020621181 is a prime.

It is a super-3 number, since 3×55020621213³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55020623213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180981 + ... + 377882.

It is an arithmetic number, because the mean of its divisors is an integer number (6623469840).

Almost surely, 2^55020621213 is an apocalyptic number.

It is an amenable number.

55020621213 is a deficient number, since it is larger than the sum of its proper divisors (24461016867).

55020621213 is a wasteful number, since it uses less digits than its factorization.

55020621213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569808 (or 569805 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 55020621213 in words is "fifty-five billion, twenty million, six hundred twenty-one thousand, two hundred thirteen".