55558031 has 2 divisors, whose sum is σ = 55558032. Its totient is φ = 55558030.

The previous prime is 55558001. The next prime is 55558039. The reversal of 55558031 is 13085555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55558031 - 2⁶ = 55557967 is a prime.

It is a super-2 number, since 2×55558031² = 6173389617193922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55558039) 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, 27779015 + 27779016.

It is an arithmetic number, because the mean of its divisors is an integer number (27779016).

Almost surely, 2^55558031 is an apocalyptic number.

55558031 is a deficient number, since it is larger than the sum of its proper divisors (1).

55558031 is an equidigital number, since it uses as much as digits as its factorization.

55558031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 55558031 is about 7453.7259810111. The cubic root of 55558031 is about 381.5770814533.

The spelling of 55558031 in words is "fifty-five million, five hundred fifty-eight thousand, thirty-one".