653231641 has 4 divisors (see below), whose sum is σ = 675756900. Its totient is φ = 630706384.

The previous prime is 653231591. The next prime is 653231669. The reversal of 653231641 is 146132356.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 413105625 + 240126016 = 20325^2 + 15496^2 .

It is not a de Polignac number, because 653231641 - 2¹¹ = 653229593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653231141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11262586 + ... + 11262643.

It is an arithmetic number, because the mean of its divisors is an integer number (168939225).

Almost surely, 2^653231641 is an apocalyptic number.

It is an amenable number.

653231641 is a deficient number, since it is larger than the sum of its proper divisors (22525259).

653231641 is a wasteful number, since it uses less digits than its factorization.

653231641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22525258.

The product of its digits is 12960, while the sum is 31.

The square root of 653231641 is about 25558.3966828907. The cubic root of 653231641 is about 867.6723090912.

Adding to 653231641 its reverse (146132356), we get a palindrome (799363997).

The spelling of 653231641 in words is "six hundred fifty-three million, two hundred thirty-one thousand, six hundred forty-one".