202152123 has 48 divisors (see below), whose sum is σ = 310542336. Its totient is φ = 126584640.

The previous prime is 202152121. The next prime is 202152133. The reversal of 202152123 is 321251202.

It is not a de Polignac number, because 202152123 - 2¹ = 202152121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202152096 and 202152105.

It is not an unprimeable number, because it can be changed into a prime (202152121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1591686 + ... + 1591812.

It is an arithmetic number, because the mean of its divisors is an integer number (6469632).

Almost surely, 2^202152123 is an apocalyptic number.

202152123 is a deficient number, since it is larger than the sum of its proper divisors (108390213).

202152123 is a wasteful number, since it uses less digits than its factorization.

202152123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 202152123 is about 14218.0210648318. The cubic root of 202152123 is about 586.8936836999.

The spelling of 202152123 in words is "two hundred two million, one hundred fifty-two thousand, one hundred twenty-three".