201545442 has 32 divisors (see below), whose sum is σ = 511862400. Its totient is φ = 57584304.

The previous prime is 201545441. The next prime is 201545471. The reversal of 201545442 is 244545102.

201545442 is a `hidden beast` number, since 201 + 5 + 454 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (201545441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266217 + ... + 266972.

It is an arithmetic number, because the mean of its divisors is an integer number (15995700).

Almost surely, 2^201545442 is an apocalyptic number.

201545442 is an abundant number, since it is smaller than the sum of its proper divisors (310316958).

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

201545442 is a wasteful number, since it uses less digits than its factorization.

201545442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533207 (or 533201 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 201545442 is about 14196.6701025276. The cubic root of 201545442 is about 586.3059843214.

The spelling of 201545442 in words is "two hundred one million, five hundred forty-five thousand, four hundred forty-two".