213515500 has 48 divisors (see below), whose sum is σ = 508723488. Its totient is φ = 77640000.

The previous prime is 213515479. The next prime is 213515557. The reversal of 213515500 is 5515312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13911 + ... + 24910.

It is an arithmetic number, because the mean of its divisors is an integer number (10598406).

Almost surely, 2^213515500 is an apocalyptic number.

213515500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213515500 is an abundant number, since it is smaller than the sum of its proper divisors (295207988).

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

213515500 is a wasteful number, since it uses less digits than its factorization.

213515500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38851 (or 38839 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 213515500 is about 14612.1695856570. The cubic root of 213515500 is about 597.6906600220.

The spelling of 213515500 in words is "two hundred thirteen million, five hundred fifteen thousand, five hundred".