654643231 has 4 divisors (see below), whose sum is σ = 714156264. Its totient is φ = 595130200.

The previous prime is 654643229. The next prime is 654643237. The reversal of 654643231 is 132346456.

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

It is a cyclic number.

It is not a de Polignac number, because 654643231 - 2¹ = 654643229 is a prime.

It is a super-2 number, since 2×654643231² = 857115519788238722, 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 (654643237) 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, 29756500 + ... + 29756521.

It is an arithmetic number, because the mean of its divisors is an integer number (178539066).

Almost surely, 2^654643231 is an apocalyptic number.

654643231 is a deficient number, since it is larger than the sum of its proper divisors (59513033).

654643231 is a wasteful number, since it uses less digits than its factorization.

654643231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59513032.

The product of its digits is 51840, while the sum is 34.

The square root of 654643231 is about 25585.9967755802. The cubic root of 654643231 is about 868.2968534337.

Adding to 654643231 its reverse (132346456), we get a palindrome (786989687).

The spelling of 654643231 in words is "six hundred fifty-four million, six hundred forty-three thousand, two hundred thirty-one".