213540555320 has 128 divisors (see below), whose sum is σ = 497635608960. Its totient is φ = 82405693440.

The previous prime is 213540555311. The next prime is 213540555331. The reversal of 213540555320 is 23555045312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133712762 + ... + 133714358.

It is an arithmetic number, because the mean of its divisors is an integer number (3887778195).

Almost surely, 2^213540555320 is an apocalyptic number.

213540555320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213540555320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248817804480).

213540555320 is an abundant number, since it is smaller than the sum of its proper divisors (284095053640).

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

213540555320 is a wasteful number, since it uses less digits than its factorization.

213540555320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353 (or 2349 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 213540555320 in words is "two hundred thirteen billion, five hundred forty million, five hundred fifty-five thousand, three hundred twenty".