55810842 has 8 divisors (see below), whose sum is σ = 111621696. Its totient is φ = 18603612.

The previous prime is 55810841. The next prime is 55810889. The reversal of 55810842 is 24801855.

It is a sphenic number, since it is the product of 3 distinct primes.

55810842 is an admirable number.

It is a super-2 number, since 2×55810842² = 6229700169497928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55810841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4650898 + ... + 4650909.

It is an arithmetic number, because the mean of its divisors is an integer number (13952712).

Almost surely, 2^55810842 is an apocalyptic number.

55810842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55810842 is a wasteful number, since it uses less digits than its factorization.

55810842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9301812.

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 55810842 is about 7470.6654322088. The cubic root of 55810842 is about 382.1549812923.

The spelling of 55810842 in words is "fifty-five million, eight hundred ten thousand, eight hundred forty-two".