55557198 has 16 divisors (see below), whose sum is σ = 123460560. Its totient is φ = 18519048.

The previous prime is 55557181. The next prime is 55557209. The reversal of 55557198 is 89175555.

55557198 is a `hidden beast` number, since 5 + 5 + 557 + 1 + 98 = 666.

It is a super-2 number, since 2×55557198² = 6173204499222408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514365 + ... + 514472.

It is an arithmetic number, because the mean of its divisors is an integer number (7716285).

Almost surely, 2^55557198 is an apocalyptic number.

55557198 is an abundant number, since it is smaller than the sum of its proper divisors (67903362).

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

55557198 is a wasteful number, since it uses less digits than its factorization.

55557198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028848 (or 1028842 counting only the distinct ones).

The product of its digits is 315000, while the sum is 45.

The square root of 55557198 is about 7453.6701027078. The cubic root of 55557198 is about 381.5751744065.

It can be divided in two parts, 55557 and 198, that added together give a palindrome (55755).

The spelling of 55557198 in words is "fifty-five million, five hundred fifty-seven thousand, one hundred ninety-eight".