551222215401 has 32 divisors (see below), whose sum is σ = 870044313600. Its totient is φ = 306022017600.

The previous prime is 551222215361. The next prime is 551222215403. The reversal of 551222215401 is 104512222155.

It is not a de Polignac number, because 551222215401 - 2¹⁵ = 551222182633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (551222215403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4848001 + ... + 4960398.

It is an arithmetic number, because the mean of its divisors is an integer number (27188884800).

Almost surely, 2^551222215401 is an apocalyptic number.

It is an amenable number.

551222215401 is a deficient number, since it is larger than the sum of its proper divisors (318822098199).

551222215401 is a wasteful number, since it uses less digits than its factorization.

551222215401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808557.

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 551222215401 its reverse (104512222155), we get a palindrome (655734437556).

The spelling of 551222215401 in words is "five hundred fifty-one billion, two hundred twenty-two million, two hundred fifteen thousand, four hundred one".