243648031 has 8 divisors (see below), whose sum is σ = 266472144. Its totient is φ = 220936320.

The previous prime is 243648023. The next prime is 243648089. The reversal of 243648031 is 130846342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243648031 - 2³ = 243648023 is a prime.

It is a super-2 number, since 2×243648031² = 118728726020353922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243647984 and 243648002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243648011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23530 + ... + 32263.

It is an arithmetic number, because the mean of its divisors is an integer number (33309018).

Almost surely, 2^243648031 is an apocalyptic number.

243648031 is a deficient number, since it is larger than the sum of its proper divisors (22824113).

243648031 is a wasteful number, since it uses less digits than its factorization.

243648031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56201.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 243648031 is about 15609.2290328510. The cubic root of 243648031 is about 624.5793700963.

The spelling of 243648031 in words is "two hundred forty-three million, six hundred forty-eight thousand, thirty-one".