55497351281 has 16 divisors (see below), whose sum is σ = 57318934608. Its totient is φ = 53693337600.

The previous prime is 55497351263. The next prime is 55497351317. The reversal of 55497351281 is 18215379455.

It can be written as a sum of positive squares in 8 ways, for example, as 865301056 + 54632050225 = 29416^2 + 233735^2 .

It is a cyclic number.

It is not a de Polignac number, because 55497351281 - 2²² = 55493156977 is a prime.

It is a super-2 number, since 2×55497351281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55497351251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7073921 + ... + 7081761.

It is an arithmetic number, because the mean of its divisors is an integer number (3582433413).

Almost surely, 2^55497351281 is an apocalyptic number.

It is an amenable number.

55497351281 is a deficient number, since it is larger than the sum of its proper divisors (1821583327).

55497351281 is a wasteful number, since it uses less digits than its factorization.

55497351281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8932.

The product of its digits is 1512000, while the sum is 50.

The spelling of 55497351281 in words is "fifty-five billion, four hundred ninety-seven million, three hundred fifty-one thousand, two hundred eighty-one".