202123144 has 16 divisors (see below), whose sum is σ = 385405200. Its totient is φ = 99348432.

The previous prime is 202123139. The next prime is 202123147. The reversal of 202123144 is 441321202.

It is not an unprimeable number, because it can be changed into a prime (202123147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213642 + ... + 214585.

It is an arithmetic number, because the mean of its divisors is an integer number (24087825).

Almost surely, 2^202123144 is an apocalyptic number.

It is an amenable number.

202123144 is a deficient number, since it is larger than the sum of its proper divisors (183282056).

202123144 is a wasteful number, since it uses less digits than its factorization.

202123144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428292 (or 428288 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 202123144 is about 14217.0019343039. The cubic root of 202123144 is about 586.8656381459.

Adding to 202123144 its reverse (441321202), we get a palindrome (643444346).

The spelling of 202123144 in words is "two hundred two million, one hundred twenty-three thousand, one hundred forty-four".