213515445500 has 96 divisors (see below), whose sum is σ = 533085221760. Its totient is φ = 73184601600.

The previous prime is 213515445499. The next prime is 213515445623. The reversal of 213515445500 is 5544515312.

213515445500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17385362 + ... + 17397638.

It is an arithmetic number, because the mean of its divisors is an integer number (5552971060).

Almost surely, 2^213515445500 is an apocalyptic number.

213515445500 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 213515445500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266542610880).

213515445500 is an abundant number, since it is smaller than the sum of its proper divisors (319569776260).

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

213515445500 is a wasteful number, since it uses less digits than its factorization.

213515445500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17272 (or 17260 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 213515445500 in words is "two hundred thirteen billion, five hundred fifteen million, four hundred forty-five thousand, five hundred".