55557288 has 24 divisors (see below), whose sum is σ = 150467850. Its totient is φ = 18519072.

The previous prime is 55557283. The next prime is 55557319. The reversal of 55557288 is 88275555.

It can be written as a sum of positive squares in only one way, i.e., 30935844 + 24621444 = 5562^2 + 4962^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×55557288² = 6173224499829888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55557283) 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, 385743 + ... + 385886.

Almost surely, 2^55557288 is an apocalyptic number.

It is an amenable number.

55557288 is an abundant number, since it is smaller than the sum of its proper divisors (94910562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55557288 is a wasteful number, since it uses less digits than its factorization.

55557288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771641 (or 771634 counting only the distinct ones).

The product of its digits is 560000, while the sum is 45.

The square root of 55557288 is about 7453.6761399996. The cubic root of 55557288 is about 381.5753804509.

The spelling of 55557288 in words is "fifty-five million, five hundred fifty-seven thousand, two hundred eighty-eight".