55490231 has 8 divisors (see below), whose sum is σ = 56388864. Its totient is φ = 54597240.

The previous prime is 55490207. The next prime is 55490233. The reversal of 55490231 is 13209455.

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 55490231 - 2²² = 51295927 is a prime.

It is a super-2 number, since 2×55490231² = 6158331472866722, 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 = 55490194 and 55490203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55490233) 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, 21260 + ... + 23726.

It is an arithmetic number, because the mean of its divisors is an integer number (7048608).

Almost surely, 2^55490231 is an apocalyptic number.

55490231 is a deficient number, since it is larger than the sum of its proper divisors (898633).

55490231 is a wasteful number, since it uses less digits than its factorization.

55490231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 55490231 is about 7449.1765316711. The cubic root of 55490231 is about 381.4217996298.

Adding to 55490231 its reverse (13209455), we get a palindrome (68699686).

The spelling of 55490231 in words is "fifty-five million, four hundred ninety thousand, two hundred thirty-one".