648231133 has 4 divisors (see below), whose sum is σ = 707161248. Its totient is φ = 589301020.

The previous prime is 648231119. The next prime is 648231139. The reversal of 648231133 is 331132846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 648231133 - 2¹³ = 648222941 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648231095 and 648231104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648231139) 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, 29465041 + ... + 29465062.

It is an arithmetic number, because the mean of its divisors is an integer number (176790312).

Almost surely, 2^648231133 is an apocalyptic number.

It is an amenable number.

648231133 is a deficient number, since it is larger than the sum of its proper divisors (58930115).

648231133 is a wasteful number, since it uses less digits than its factorization.

648231133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58930114.

The product of its digits is 10368, while the sum is 31.

The square root of 648231133 is about 25460.3835988384. The cubic root of 648231133 is about 865.4526162103.

Adding to 648231133 its reverse (331132846), we get a palindrome (979363979).

It can be divided in two parts, 64823 and 1133, that added together give a palindrome (65956).

The spelling of 648231133 in words is "six hundred forty-eight million, two hundred thirty-one thousand, one hundred thirty-three".