213562830 has 128 divisors (see below), whose sum is σ = 575963136. Its totient is φ = 50342400.

The previous prime is 213562801. The next prime is 213562841. The reversal of 213562830 is 38265312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1118035 + ... + 1118225.

It is an arithmetic number, because the mean of its divisors is an integer number (4499712).

Almost surely, 2^213562830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213562830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287981568).

213562830 is an abundant number, since it is smaller than the sum of its proper divisors (362400306).

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

213562830 is a wasteful number, since it uses less digits than its factorization.

213562830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 213562830 is about 14613.7890363861. The cubic root of 213562830 is about 597.7348201399.

The spelling of 213562830 in words is "two hundred thirteen million, five hundred sixty-two thousand, eight hundred thirty".