550724252221 has 24 divisors (see below), whose sum is σ = 686217160160. Its totient is φ = 437822716320.

The previous prime is 550724252219. The next prime is 550724252279. The reversal of 550724252221 is 122252427055.

It is not a de Polignac number, because 550724252221 - 2¹ = 550724252219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550724252621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9183555 + ... + 9243328.

Almost surely, 2^550724252221 is an apocalyptic number.

It is an amenable number.

550724252221 is a deficient number, since it is larger than the sum of its proper divisors (135492907939).

550724252221 is a wasteful number, since it uses less digits than its factorization.

550724252221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18426937 (or 18426926 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 37.

Adding to 550724252221 its reverse (122252427055), we get a palindrome (672976679276).

The spelling of 550724252221 in words is "five hundred fifty billion, seven hundred twenty-four million, two hundred fifty-two thousand, two hundred twenty-one".