2153520220 has 48 divisors (see below), whose sum is σ = 4793076288. Its totient is φ = 809948160.

The previous prime is 2153520197. The next prime is 2153520223. The reversal of 2153520220 is 220253512.

It is a junction number, because it is equal to n+sod(n) for n = 2153520191 and 2153520200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153520223) 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, 440590 + ... + 445450.

It is an arithmetic number, because the mean of its divisors is an integer number (99855756).

Almost surely, 2^2153520220 is an apocalyptic number.

2153520220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2153520220 is an abundant number, since it is smaller than the sum of its proper divisors (2639556068).

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

2153520220 is a wasteful number, since it uses less digits than its factorization.

2153520220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6190 (or 6188 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2153520220 is about 46406.0364607882. The cubic root of 2153520220 is about 1291.3669023602.

Adding to 2153520220 its reverse (220253512), we get a palindrome (2373773732).

The spelling of 2153520220 in words is "two billion, one hundred fifty-three million, five hundred twenty thousand, two hundred twenty".