551354023221 has 16 divisors (see below), whose sum is σ = 741694933440. Its totient is φ = 364305392640.

The previous prime is 551354023211. The next prime is 551354023249. The reversal of 551354023221 is 122320453155.

It is not a de Polignac number, because 551354023221 - 2¹⁴ = 551354006837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551354023211) 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 15 ways as a sum of consecutive naturals, for example, 1614235 + ... + 1925736.

It is an arithmetic number, because the mean of its divisors is an integer number (46355933340).

Almost surely, 2^551354023221 is an apocalyptic number.

It is an amenable number.

551354023221 is a deficient number, since it is larger than the sum of its proper divisors (190340910219).

551354023221 is a wasteful number, since it uses less digits than its factorization.

551354023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540436.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 551354023221 its reverse (122320453155), we get a palindrome (673674476376).

The spelling of 551354023221 in words is "five hundred fifty-one billion, three hundred fifty-four million, twenty-three thousand, two hundred twenty-one".