213501530 has 64 divisors (see below), whose sum is σ = 433589760. Its totient is φ = 75028800.

The previous prime is 213501527. The next prime is 213501539. The reversal of 213501530 is 35105312.

It is not an unprimeable number, because it can be changed into a prime (213501539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434585 + ... + 435075.

It is an arithmetic number, because the mean of its divisors is an integer number (6774840).

Almost surely, 2^213501530 is an apocalyptic number.

213501530 is an abundant number, since it is smaller than the sum of its proper divisors (220088230).

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

213501530 is a wasteful number, since it uses less digits than its factorization.

213501530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 213501530 is about 14611.6915516308. The cubic root of 213501530 is about 597.6776244022.

Adding to 213501530 its reverse (35105312), we get a palindrome (248606842).

The spelling of 213501530 in words is "two hundred thirteen million, five hundred one thousand, five hundred thirty".