55810231 has 8 divisors (see below), whose sum is σ = 56488320. Its totient is φ = 55136568.

The previous prime is 55810229. The next prime is 55810243. The reversal of 55810231 is 13201855.

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 55810231 - 2¹ = 55810229 is a prime.

It is a super-2 number, since 2×55810231² = 6229563768546722, 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 = 55810196 and 55810205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55810631) 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, 28960 + ... + 30826.

It is an arithmetic number, because the mean of its divisors is an integer number (7061040).

Almost surely, 2^55810231 is an apocalyptic number.

55810231 is a deficient number, since it is larger than the sum of its proper divisors (678089).

55810231 is a wasteful number, since it uses less digits than its factorization.

55810231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 55810231 is about 7470.6245388187. The cubic root of 55810231 is about 382.1535867153.

The spelling of 55810231 in words is "fifty-five million, eight hundred ten thousand, two hundred thirty-one".