55505031 has 8 divisors (see below), whose sum is σ = 75049344. Its totient is φ = 36482040.

The previous prime is 55505029. The next prime is 55505071. The reversal of 55505031 is 13050555.

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

It is not a de Polignac number, because 55505031 - 2¹ = 55505029 is a prime.

It is a super-2 number, since 2×55505031² = 6161616932621922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55504992 and 55505010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505071) 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, 130081 + ... + 130506.

It is an arithmetic number, because the mean of its divisors is an integer number (9381168).

Almost surely, 2^55505031 is an apocalyptic number.

55505031 is a deficient number, since it is larger than the sum of its proper divisors (19544313).

55505031 is a wasteful number, since it uses less digits than its factorization.

55505031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260661.

The product of its (nonzero) digits is 1875, while the sum is 24.

The square root of 55505031 is about 7450.1698638353. The cubic root of 55505031 is about 381.4557067443.

Adding to 55505031 its reverse (13050555), we get a palindrome (68555586).

The spelling of 55505031 in words is "fifty-five million, five hundred five thousand, thirty-one".