551320821273 has 16 divisors (see below), whose sum is σ = 742026445056. Its totient is φ = 364084949760.

The previous prime is 551320821263. The next prime is 551320821277. The reversal of 551320821273 is 372128023155.

It is not a de Polignac number, because 551320821273 - 2²² = 551316626969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (551320821277) 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, 123136 + ... + 1057262.

It is an arithmetic number, because the mean of its divisors is an integer number (46376652816).

Almost surely, 2^551320821273 is an apocalyptic number.

It is an amenable number.

551320821273 is a deficient number, since it is larger than the sum of its proper divisors (190705623783).

551320821273 is a wasteful number, since it uses less digits than its factorization.

551320821273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935984.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 551320821273 in words is "five hundred fifty-one billion, three hundred twenty million, eight hundred twenty-one thousand, two hundred seventy-three".