55530031 has 4 divisors (see below), whose sum is σ = 56884464. Its totient is φ = 54175600.

The previous prime is 55530029. The next prime is 55530043. The reversal of 55530031 is 13003555.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55530031 - 2¹ = 55530029 is a prime.

It is a super-2 number, since 2×55530031² = 6167168685721922, 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 = 55529984 and 55530011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530011) 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, 677155 + ... + 677236.

It is an arithmetic number, because the mean of its divisors is an integer number (14221116).

Almost surely, 2^55530031 is an apocalyptic number.

55530031 is a deficient number, since it is larger than the sum of its proper divisors (1354433).

55530031 is a wasteful number, since it uses less digits than its factorization.

55530031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354432.

The product of its (nonzero) digits is 1125, while the sum is 22.

The square root of 55530031 is about 7451.8474890459. The cubic root of 55530031 is about 381.5129685882.

Adding to 55530031 its reverse (13003555), we get a palindrome (68533586).

The spelling of 55530031 in words is "fifty-five million, five hundred thirty thousand, thirty-one".