551367005721 has 16 divisors (see below), whose sum is σ = 845332767744. Its totient is φ = 313133932944.

The previous prime is 551367005663. The next prime is 551367005831. The reversal of 551367005721 is 127500763155.

It is not a de Polignac number, because 551367005721 - 2¹⁴ = 551366989337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551367005521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80535141 + ... + 80541986.

It is an arithmetic number, because the mean of its divisors is an integer number (52833297984).

Almost surely, 2^551367005721 is an apocalyptic number.

It is an amenable number.

551367005721 is a deficient number, since it is larger than the sum of its proper divisors (293965762023).

551367005721 is a wasteful number, since it uses less digits than its factorization.

551367005721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161077300.

The product of its (nonzero) digits is 220500, while the sum is 42.

Adding to 551367005721 its reverse (127500763155), we get a palindrome (678867768876).

The spelling of 551367005721 in words is "five hundred fifty-one billion, three hundred sixty-seven million, five thousand, seven hundred twenty-one".