55557530 has 32 divisors (see below), whose sum is σ = 121015296. Its totient is φ = 17927424.

The previous prime is 55557521. The next prime is 55557563. The reversal of 55557530 is 3575555.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22154 + ... + 24533.

It is an arithmetic number, because the mean of its divisors is an integer number (3781728).

Almost surely, 2^55557530 is an apocalyptic number.

55557530 is an abundant number, since it is smaller than the sum of its proper divisors (65457766).

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

55557530 is a wasteful number, since it uses less digits than its factorization.

55557530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46718.

The product of its (nonzero) digits is 65625, while the sum is 35.

The square root of 55557530 is about 7453.6923735824. The cubic root of 55557530 is about 381.5759344802.

It can be divided in two parts, 555 and 57530, that added together give a palindrome (58085).

The spelling of 55557530 in words is "fifty-five million, five hundred fifty-seven thousand, five hundred thirty".