550221523531 has 2 divisors, whose sum is σ = 550221523532. Its totient is φ = 550221523530.

The previous prime is 550221523529. The next prime is 550221523549. The reversal of 550221523531 is 135325122055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 550221523531 - 2¹ = 550221523529 is a prime.

It is a super-2 number, since 2×550221523531² (a number of 24 digits) contains 22 as substring.

Together with 550221523529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (550221520531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275110761765 + 275110761766.

It is an arithmetic number, because the mean of its divisors is an integer number (275110761766).

Almost surely, 2^550221523531 is an apocalyptic number.

550221523531 is a deficient number, since it is larger than the sum of its proper divisors (1).

550221523531 is an equidigital number, since it uses as much as digits as its factorization.

550221523531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 550221523531 its reverse (135325122055), we get a palindrome (685546645586).

The spelling of 550221523531 in words is "five hundred fifty billion, two hundred twenty-one million, five hundred twenty-three thousand, five hundred thirty-one".