213531430 has 32 divisors (see below), whose sum is σ = 439838784. Its totient is φ = 73115136.

The previous prime is 213531419. The next prime is 213531431. The reversal of 213531430 is 34135312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213531431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70834 + ... + 73786.

It is an arithmetic number, because the mean of its divisors is an integer number (13744962).

Almost surely, 2^213531430 is an apocalyptic number.

213531430 is an abundant number, since it is smaller than the sum of its proper divisors (226307354).

213531430 is a wasteful number, since it uses less digits than its factorization.

213531430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 213531430 is about 14612.7146690819. The cubic root of 213531430 is about 597.7055238538.

Adding to 213531430 its reverse (34135312), we get a palindrome (247666742).

The spelling of 213531430 in words is "two hundred thirteen million, five hundred thirty-one thousand, four hundred thirty".