55531230 has 96 divisors (see below), whose sum is σ = 144488448. Its totient is φ = 13641600.

The previous prime is 55531211. The next prime is 55531241. The reversal of 55531230 is 3213555.

55531230 = 205² + 206² + ... + 559².

It is a self number, because there is not a number n which added to its sum of digits gives 55531230.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 782095 + ... + 782165.

It is an arithmetic number, because the mean of its divisors is an integer number (1505088).

Almost surely, 2^55531230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55531230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72244224).

55531230 is an abundant number, since it is smaller than the sum of its proper divisors (88957218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55531230 is a wasteful number, since it uses less digits than its factorization.

55531230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 55531230 is about 7451.9279384600. The cubic root of 55531230 is about 381.5157144343.

Adding to 55531230 its reverse (3213555), we get a palindrome (58744785).

The spelling of 55531230 in words is "fifty-five million, five hundred thirty-one thousand, two hundred thirty".