653231261 has 4 divisors (see below), whose sum is σ = 655659900. Its totient is φ = 650802624.

The previous prime is 653231251. The next prime is 653231279. The reversal of 653231261 is 162132356.

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 27931225 + 625300036 = 5285^2 + 25006^2 .

It is a cyclic number.

It is not a de Polignac number, because 653231261 - 2²² = 649036957 is a prime.

It is a super-2 number, since 2×653231261² = 853422160695300242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653231251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213916 + ... + 1214453.

It is an arithmetic number, because the mean of its divisors is an integer number (163914975).

Almost surely, 2^653231261 is an apocalyptic number.

It is an amenable number.

653231261 is a deficient number, since it is larger than the sum of its proper divisors (2428639).

653231261 is a wasteful number, since it uses less digits than its factorization.

653231261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428638.

The product of its digits is 6480, while the sum is 29.

The square root of 653231261 is about 25558.3892489335. The cubic root of 653231261 is about 867.6721408428.

The spelling of 653231261 in words is "six hundred fifty-three million, two hundred thirty-one thousand, two hundred sixty-one".