55730289 has 4 divisors (see below), whose sum is σ = 74307056. Its totient is φ = 37153524.

The previous prime is 55730273. The next prime is 55730291. The reversal of 55730289 is 98203755.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55730289 - 2⁴ = 55730273 is a prime.

It is a super-2 number, since 2×55730289² = 6211730224047042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55730239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9288379 + ... + 9288384.

It is an arithmetic number, because the mean of its divisors is an integer number (18576764).

Almost surely, 2^55730289 is an apocalyptic number.

It is an amenable number.

55730289 is a deficient number, since it is larger than the sum of its proper divisors (18576767).

55730289 is a wasteful number, since it uses less digits than its factorization.

55730289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18576766.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 55730289 is about 7465.2721986542. The cubic root of 55730289 is about 381.9710352388.

The spelling of 55730289 in words is "fifty-five million, seven hundred thirty thousand, two hundred eighty-nine".