55121210533 has 8 divisors (see below), whose sum is σ = 60901184448. Its totient is φ = 49623186624.

The previous prime is 55121210497. The next prime is 55121210549. The reversal of 55121210533 is 33501212155.

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 55121210533 - 2²¹ = 55119113381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121210563) 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, 70487091 + ... + 70487872.

It is an arithmetic number, because the mean of its divisors is an integer number (7612648056).

Almost surely, 2^55121210533 is an apocalyptic number.

It is an amenable number.

55121210533 is a deficient number, since it is larger than the sum of its proper divisors (5779973915).

55121210533 is a wasteful number, since it uses less digits than its factorization.

55121210533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140975003.

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 55121210533 its reverse (33501212155), we get a palindrome (88622422688).

The spelling of 55121210533 in words is "fifty-five billion, one hundred twenty-one million, two hundred ten thousand, five hundred thirty-three".