55919810 has 16 divisors (see below), whose sum is σ = 100849536. Its totient is φ = 22324848.

The previous prime is 55919803. The next prime is 55919819. The reversal of 55919810 is 1891955.

It is a super-2 number, since 2×55919810² = 6254050300872200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55919819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359 + ... + 10581.

It is an arithmetic number, because the mean of its divisors is an integer number (6303096).

Almost surely, 2^55919810 is an apocalyptic number.

55919810 is a deficient number, since it is larger than the sum of its proper divisors (44929726).

55919810 is a wasteful number, since it uses less digits than its factorization.

55919810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10777.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 55919810 is about 7477.9549343387. The cubic root of 55919810 is about 382.4035327093.

The spelling of 55919810 in words is "fifty-five million, nine hundred nineteen thousand, eight hundred ten".