153033221 has 8 divisors (see below), whose sum is σ = 171457824. Its totient is φ = 135360720.

The previous prime is 153033217. The next prime is 153033227. The reversal of 153033221 is 122330351.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 153033221 - 2² = 153033217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 153033193 and 153033202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153033227) 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, 187595 + ... + 188408.

It is an arithmetic number, because the mean of its divisors is an integer number (21432228).

Almost surely, 2^153033221 is an apocalyptic number.

153033221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

153033221 is a deficient number, since it is larger than the sum of its proper divisors (18424603).

153033221 is a wasteful number, since it uses less digits than its factorization.

153033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376051.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 153033221 is about 12370.6596832990. The cubic root of 153033221 is about 534.8868319751.

Adding to 153033221 its reverse (122330351), we get a palindrome (275363572).

The spelling of 153033221 in words is "one hundred fifty-three million, thirty-three thousand, two hundred twenty-one".