243515555501231 has 32 divisors (see below), whose sum is σ = 268618109760000. Its totient is φ = 219333789779328.

The previous prime is 243515555501201. The next prime is 243515555501237. The reversal of 243515555501231 is 132105555515342.

It is a cyclic number.

It is not a de Polignac number, because 243515555501231 - 2⁶ = 243515555501167 is a prime.

It is a super-2 number, since 2×243515555501231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243515555501237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2221417340 + ... + 2221526958.

It is an arithmetic number, because the mean of its divisors is an integer number (8394315930000).

Almost surely, 2^{243515555501231} is an apocalyptic number.

243515555501231 is a deficient number, since it is larger than the sum of its proper divisors (25102554258769).

243515555501231 is a wasteful number, since it uses less digits than its factorization.

243515555501231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113663.

The product of its (nonzero) digits is 2250000, while the sum is 47.

The spelling of 243515555501231 in words is "two hundred forty-three trillion, five hundred fifteen billion, five hundred fifty-five million, five hundred one thousand, two hundred thirty-one".