550231621 has 8 divisors (see below), whose sum is σ = 580456800. Its totient is φ = 520133040.

The previous prime is 550231609. The next prime is 550231631. The reversal of 550231621 is 126132055.

550231621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 550231621 - 2⁵ = 550231589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550231631) 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, 22651 + ... + 40168.

It is an arithmetic number, because the mean of its divisors is an integer number (72557100).

Almost surely, 2^550231621 is an apocalyptic number.

It is an amenable number.

550231621 is a deficient number, since it is larger than the sum of its proper divisors (30225179).

550231621 is a wasteful number, since it uses less digits than its factorization.

550231621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63299.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 550231621 is about 23457.0164556365. The cubic root of 550231621 is about 819.4362677999.

Adding to 550231621 its reverse (126132055), we get a palindrome (676363676).

It can be divided in two parts, 55023 and 1621, that added together give a square (56644 = 238²).

The spelling of 550231621 in words is "five hundred fifty million, two hundred thirty-one thousand, six hundred twenty-one".