55557499 has 2 divisors, whose sum is σ = 55557500. Its totient is φ = 55557498.

The previous prime is 55557427. The next prime is 55557511. The reversal of 55557499 is 99475555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55557499 - 2¹⁵ = 55524731 is a prime.

It is not a weakly prime, because it can be changed into another prime (55557899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27778749 + 27778750.

It is an arithmetic number, because the mean of its divisors is an integer number (27778750).

Almost surely, 2^55557499 is an apocalyptic number.

55557499 is a deficient number, since it is larger than the sum of its proper divisors (1).

55557499 is an equidigital number, since it uses as much as digits as its factorization.

55557499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417500, while the sum is 49.

The square root of 55557499 is about 7453.6902940758. The cubic root of 55557499 is about 381.5758635096.

The spelling of 55557499 in words is "fifty-five million, five hundred fifty-seven thousand, four hundred ninety-nine".