648095231 has 4 divisors (see below), whose sum is σ = 740680272. Its totient is φ = 555510192.

The previous prime is 648095213. The next prime is 648095237. The reversal of 648095231 is 132590846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132590846 = 2 ⋅66295423.

It is a cyclic number.

It is not a de Polignac number, because 648095231 - 2⁶ = 648095167 is a prime.

It is a super-2 number, since 2×648095231² = 840054856889886722, 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 (648095237) 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, 46292510 + ... + 46292523.

It is an arithmetic number, because the mean of its divisors is an integer number (185170068).

Almost surely, 2^648095231 is an apocalyptic number.

648095231 is a deficient number, since it is larger than the sum of its proper divisors (92585041).

648095231 is an equidigital number, since it uses as much as digits as its factorization.

648095231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92585040.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 648095231 is about 25457.7145674941. The cubic root of 648095231 is about 865.3921311169.

The spelling of 648095231 in words is "six hundred forty-eight million, ninety-five thousand, two hundred thirty-one".