202323421542 has 32 divisors (see below), whose sum is σ = 441509981184. Its totient is φ = 61299424800.

The previous prime is 202323421537. The next prime is 202323421591. The reversal of 202323421542 is 245124323202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117528 + ... + 646884.

It is an arithmetic number, because the mean of its divisors is an integer number (13797186912).

Almost surely, 2^202323421542 is an apocalyptic number.

202323421542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

202323421542 is an abundant number, since it is smaller than the sum of its proper divisors (239186559642).

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

202323421542 is a wasteful number, since it uses less digits than its factorization.

202323421542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535164.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 202323421542 its reverse (245124323202), we get a palindrome (447447744744).

The spelling of 202323421542 in words is "two hundred two billion, three hundred twenty-three million, four hundred twenty-one thousand, five hundred forty-two".