202512105243 has 96 divisors (see below), whose sum is σ = 376900992000. Its totient is φ = 104178057984.

The previous prime is 202512105241. The next prime is 202512105251. The reversal of 202512105243 is 342501215202.

202512105243 is a `hidden beast` number, since 2 + 0 + 2 + 512 + 105 + 2 + 43 = 666.

It is not a de Polignac number, because 202512105243 - 2¹ = 202512105241 is a prime.

It is a super-2 number, since 2×202512105243² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202512105241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1123128 + ... + 1290906.

It is an arithmetic number, because the mean of its divisors is an integer number (3926052000).

Almost surely, 2^202512105243 is an apocalyptic number.

202512105243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

202512105243 is a deficient number, since it is larger than the sum of its proper divisors (174388886757).

202512105243 is a wasteful number, since it uses less digits than its factorization.

202512105243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167846 (or 167829 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 202512105243 in words is "two hundred two billion, five hundred twelve million, one hundred five thousand, two hundred forty-three".