235721130 has 16 divisors (see below), whose sum is σ = 565730784. Its totient is φ = 62858960.

The previous prime is 235721119. The next prime is 235721147. The reversal of 235721130 is 31127532.

It is a super-2 number, since 2×235721130² = 111128902256953800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 235721130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3928656 + ... + 3928715.

It is an arithmetic number, because the mean of its divisors is an integer number (35358174).

Almost surely, 2^235721130 is an apocalyptic number.

235721130 is an abundant number, since it is smaller than the sum of its proper divisors (330009654).

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

235721130 is a wasteful number, since it uses less digits than its factorization.

235721130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7857381.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 235721130 is about 15353.2123674494. The cubic root of 235721130 is about 617.7311542051.

Adding to 235721130 its reverse (31127532), we get a palindrome (266848662).

The spelling of 235721130 in words is "two hundred thirty-five million, seven hundred twenty-one thousand, one hundred thirty".