153550221 has 16 divisors (see below), whose sum is σ = 224512320. Its totient is φ = 92574720.

The previous prime is 153550181. The next prime is 153550247. The reversal of 153550221 is 122055351.

It is a happy number.

It is not a de Polignac number, because 153550221 - 2¹¹ = 153548173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 153550191 and 153550200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153550261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5686 + ... + 18423.

It is an arithmetic number, because the mean of its divisors is an integer number (14032020).

Almost surely, 2^153550221 is an apocalyptic number.

153550221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

153550221 is a deficient number, since it is larger than the sum of its proper divisors (70962099).

153550221 is a wasteful number, since it uses less digits than its factorization.

153550221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24316.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 153550221 is about 12391.5382822311. The cubic root of 153550221 is about 535.4885001641.

The spelling of 153550221 in words is "one hundred fifty-three million, five hundred fifty thousand, two hundred twenty-one".