55557289 has 4 divisors (see below), whose sum is σ = 56076624. Its totient is φ = 55037956.

The previous prime is 55557283. The next prime is 55557319. The reversal of 55557289 is 98275555.

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 a cyclic number.

It is not a de Polignac number, because 55557289 - 2⁹ = 55556777 is a prime.

It is a super-2 number, since 2×55557289² = 6173224722059042, which contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 259507 + ... + 259720.

It is an arithmetic number, because the mean of its divisors is an integer number (14019156).

Almost surely, 2^55557289 is an apocalyptic number.

It is an amenable number.

55557289 is a deficient number, since it is larger than the sum of its proper divisors (519335).

55557289 is a wasteful number, since it uses less digits than its factorization.

55557289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519334.

The product of its digits is 630000, while the sum is 46.

The square root of 55557289 is about 7453.6762070806. The cubic root of 55557289 is about 381.5753827403.

The spelling of 55557289 in words is "fifty-five million, five hundred fifty-seven thousand, two hundred eighty-nine".