55108831 has 4 divisors (see below), whose sum is σ = 55438992. Its totient is φ = 54778672.

The previous prime is 55108829. The next prime is 55108841. The reversal of 55108831 is 13880155.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55108831 - 2¹ = 55108829 is a prime.

It is a super-2 number, since 2×55108831² = 6073966508373122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55108793 and 55108802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55108841) 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, 164830 + ... + 165163.

It is an arithmetic number, because the mean of its divisors is an integer number (13859748).

Almost surely, 2^55108831 is an apocalyptic number.

55108831 is a deficient number, since it is larger than the sum of its proper divisors (330161).

55108831 is a wasteful number, since it uses less digits than its factorization.

55108831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330160.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 55108831 is about 7423.5322455015. The cubic root of 55108831 is about 380.5459166409.

Adding to 55108831 its reverse (13880155), we get a palindrome (68988986).

It can be divided in two parts, 5510 and 8831, that added together give a palindrome (14341).

The spelling of 55108831 in words is "fifty-five million, one hundred eight thousand, eight hundred thirty-one".