55151403221 has 8 divisors (see below), whose sum is σ = 55548138240. Its totient is φ = 54755380512.

The previous prime is 55151403191. The next prime is 55151403233. The reversal of 55151403221 is 12230415155.

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 55151403221 - 2²⁶ = 55084294357 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 (55151403521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22181 + ... + 332858.

It is an arithmetic number, because the mean of its divisors is an integer number (6943517280).

Almost surely, 2^55151403221 is an apocalyptic number.

It is an amenable number.

55151403221 is a deficient number, since it is larger than the sum of its proper divisors (396735019).

55151403221 is a wasteful number, since it uses less digits than its factorization.

55151403221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356155.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 55151403221 its reverse (12230415155), we get a palindrome (67381818376).

The spelling of 55151403221 in words is "fifty-five billion, one hundred fifty-one million, four hundred three thousand, two hundred twenty-one".