201215542 has 16 divisors (see below), whose sum is σ = 329499072. Its totient is φ = 91395720.

The previous prime is 201215527. The next prime is 201215549. The reversal of 201215542 is 245512102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201215549) 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, 41413 + ... + 46015.

It is an arithmetic number, because the mean of its divisors is an integer number (20593692).

Almost surely, 2^201215542 is an apocalyptic number.

201215542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

201215542 is a deficient number, since it is larger than the sum of its proper divisors (128283530).

201215542 is a wasteful number, since it uses less digits than its factorization.

201215542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6603.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 201215542 is about 14185.0464222011. The cubic root of 201215542 is about 585.9859109707.

Adding to 201215542 its reverse (245512102), we get a palindrome (446727644).

The spelling of 201215542 in words is "two hundred one million, two hundred fifteen thousand, five hundred forty-two".