201005442 has 48 divisors (see below), whose sum is σ = 490993440. Its totient is φ = 60908760.

The previous prime is 201005429. The next prime is 201005443. The reversal of 201005442 is 244500102.

201005442 is a `hidden beast` number, since 20 + 100 + 544 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201005443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8848 + ... + 21915.

It is an arithmetic number, because the mean of its divisors is an integer number (10229030).

Almost surely, 2^201005442 is an apocalyptic number.

201005442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201005442 is an abundant number, since it is smaller than the sum of its proper divisors (289987998).

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

201005442 is a wasteful number, since it uses less digits than its factorization.

201005442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30796 (or 30779 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 201005442 is about 14177.6388020008. The cubic root of 201005442 is about 585.7818867783.

Adding to 201005442 its reverse (244500102), we get a palindrome (445505544).

The spelling of 201005442 in words is "two hundred one million, five thousand, four hundred forty-two".