551973346521 has 16 divisors (see below), whose sum is σ = 741850871808. Its totient is φ = 365039740800.

The previous prime is 551973346501. The next prime is 551973346541. The reversal of 551973346521 is 125643379155.

It is an interprime number because it is at equal distance from previous prime (551973346501) and next prime (551973346541).

It is not a de Polignac number, because 551973346521 - 2¹¹ = 551973344473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551973346501) 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, 3161491 + ... + 3331511.

It is an arithmetic number, because the mean of its divisors is an integer number (46365679488).

Almost surely, 2^551973346521 is an apocalyptic number.

It is an amenable number.

551973346521 is a deficient number, since it is larger than the sum of its proper divisors (189877525287).

551973346521 is a wasteful number, since it uses less digits than its factorization.

551973346521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178672.

The product of its digits is 3402000, while the sum is 51.

The spelling of 551973346521 in words is "five hundred fifty-one billion, nine hundred seventy-three million, three hundred forty-six thousand, five hundred twenty-one".