203112642 has 16 divisors (see below), whose sum is σ = 413890560. Its totient is φ = 66426672.

The previous prime is 203112619. The next prime is 203112649. The reversal of 203112642 is 246211302.

It is not an unprimeable number, because it can be changed into a prime (203112649) 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, 319042 + ... + 319677.

It is an arithmetic number, because the mean of its divisors is an integer number (25868160).

Almost surely, 2^203112642 is an apocalyptic number.

203112642 is an abundant number, since it is smaller than the sum of its proper divisors (210777918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203112642 is a wasteful number, since it uses less digits than its factorization.

203112642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638777.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 203112642 is about 14251.7592598247. The cubic root of 203112642 is about 587.8217505421.

Adding to 203112642 its reverse (246211302), we get a palindrome (449323944).

The spelling of 203112642 in words is "two hundred three million, one hundred twelve thousand, six hundred forty-two".