55427831 has 8 divisors (see below), whose sum is σ = 55902000. Its totient is φ = 54956160.

The previous prime is 55427821. The next prime is 55427909. The reversal of 55427831 is 13872455.

It is a happy number.

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 55427831 - 2¹⁰ = 55426807 is a prime.

It is a super-2 number, since 2×55427831² = 6144488898729122, 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 = 55427791 and 55427800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55427821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83780 + ... + 84438.

It is an arithmetic number, because the mean of its divisors is an integer number (6987750).

Almost surely, 2^55427831 is an apocalyptic number.

55427831 is a deficient number, since it is larger than the sum of its proper divisors (474169).

55427831 is a wasteful number, since it uses less digits than its factorization.

55427831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249.

The product of its digits is 33600, while the sum is 35.

The square root of 55427831 is about 7444.9869711102. The cubic root of 55427831 is about 381.2787735696.

The spelling of 55427831 in words is "fifty-five million, four hundred twenty-seven thousand, eight hundred thirty-one".