55513289 has 6 divisors (see below), whose sum is σ = 60112206. Its totient is φ = 51242880.

The previous prime is 55513253. The next prime is 55513291. The reversal of 55513289 is 98231555.

It can be written as a sum of positive squares in 3 ways, for example, as 85264 + 55428025 = 292^2 + 7445^2 .

It is not a de Polignac number, because 55513289 - 2¹² = 55509193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55513229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164072 + ... + 164409.

It is an arithmetic number, because the mean of its divisors is an integer number (10018701).

Almost surely, 2^55513289 is an apocalyptic number.

It is an amenable number.

55513289 is a deficient number, since it is larger than the sum of its proper divisors (4598917).

55513289 is a wasteful number, since it uses less digits than its factorization.

55513289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328507 (or 328494 counting only the distinct ones).

The product of its digits is 54000, while the sum is 38.

The square root of 55513289 is about 7450.7240587744. The cubic root of 55513289 is about 381.4746233780.

The spelling of 55513289 in words is "fifty-five million, five hundred thirteen thousand, two hundred eighty-nine".