201553542 has 32 divisors (see below), whose sum is σ = 448408800. Its totient is φ = 67107744.

The previous prime is 201553493. The next prime is 201553549. The reversal of 201553542 is 245355102.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201553549) 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, 64848 + ... + 67884.

It is an arithmetic number, because the mean of its divisors is an integer number (14012775).

Almost surely, 2^201553542 is an apocalyptic number.

201553542 is an abundant number, since it is smaller than the sum of its proper divisors (246855258).

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

201553542 is a wasteful number, since it uses less digits than its factorization.

201553542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277 (or 4271 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 201553542 is about 14196.9553778266. The cubic root of 201553542 is about 586.3138386541.

The spelling of 201553542 in words is "two hundred one million, five hundred fifty-three thousand, five hundred forty-two".