213730146 has 96 divisors (see below), whose sum is σ = 543449088. Its totient is φ = 59453280.

The previous prime is 213730141. The next prime is 213730147. The reversal of 213730146 is 641037312.

213730146 = T₁₉₄₅ + T₁₉₄₆ + ... + T₂₀₅₁.

213730146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (213730141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1118911 + ... + 1119101.

It is an arithmetic number, because the mean of its divisors is an integer number (5660928).

Almost surely, 2^213730146 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213730146, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271724544).

213730146 is an abundant number, since it is smaller than the sum of its proper divisors (329718942).

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

213730146 is a wasteful number, since it uses less digits than its factorization.

213730146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 213730146 is about 14619.5125089724. The cubic root of 213730146 is about 597.8908780281.

Adding to 213730146 its reverse (641037312), we get a palindrome (854767458).

The spelling of 213730146 in words is "two hundred thirteen million, seven hundred thirty thousand, one hundred forty-six".