55520831 has 8 divisors (see below), whose sum is σ = 60023280. Its totient is φ = 51176448.

The previous prime is 55520791. The next prime is 55520851. The reversal of 55520831 is 13802555.

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

It is a cyclic number.

It is not a de Polignac number, because 55520831 - 2⁶ = 55520767 is a prime.

It is a super-2 number, since 2×55520831² = 6165125349861122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55520794 and 55520803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55520851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38786 + ... + 40191.

It is an arithmetic number, because the mean of its divisors is an integer number (7502910).

Almost surely, 2^55520831 is an apocalyptic number.

55520831 is a deficient number, since it is larger than the sum of its proper divisors (4502449).

55520831 is a wasteful number, since it uses less digits than its factorization.

55520831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79033.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 55520831 is about 7451.2301668919. The cubic root of 55520831 is about 381.4918982286.

The spelling of 55520831 in words is "fifty-five million, five hundred twenty thousand, eight hundred thirty-one".