55572473321 has 2 divisors, whose sum is σ = 55572473322. Its totient is φ = 55572473320.

The previous prime is 55572473251. The next prime is 55572473347. The reversal of 55572473321 is 12337427555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44295095296 + 11277378025 = 210464^2 + 106195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55572473321 is a prime.

It is not a weakly prime, because it can be changed into another prime (55572473381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27786236660 + 27786236661.

It is an arithmetic number, because the mean of its divisors is an integer number (27786236661).

Almost surely, 2^55572473321 is an apocalyptic number.

It is an amenable number.

55572473321 is a deficient number, since it is larger than the sum of its proper divisors (1).

55572473321 is an equidigital number, since it uses as much as digits as its factorization.

55572473321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 44.

The spelling of 55572473321 in words is "fifty-five billion, five hundred seventy-two million, four hundred seventy-three thousand, three hundred twenty-one".