153221020 has 24 divisors (see below), whose sum is σ = 327041568. Its totient is φ = 60283200.

The previous prime is 153220993. The next prime is 153221023. The reversal of 153221020 is 20122351.

153221020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 153220985 and 153221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153221023) 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, 61576 + ... + 64015.

It is an arithmetic number, because the mean of its divisors is an integer number (13626732).

Almost surely, 2^153221020 is an apocalyptic number.

153221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153221020 is an abundant number, since it is smaller than the sum of its proper divisors (173820548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

153221020 is a wasteful number, since it uses less digits than its factorization.

153221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125661 (or 125659 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 153221020 is about 12378.2478566233. The cubic root of 153221020 is about 535.1055429822.

Adding to 153221020 its reverse (20122351), we get a palindrome (173343371).

The spelling of 153221020 in words is "one hundred fifty-three million, two hundred twenty-one thousand, twenty".