201131742 has 32 divisors (see below), whose sum is σ = 465276672. Its totient is φ = 56772864.

The previous prime is 201131719. The next prime is 201131747. The reversal of 201131742 is 247131102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131747) 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, 25363 + ... + 32334.

It is an arithmetic number, because the mean of its divisors is an integer number (14539896).

Almost surely, 2^201131742 is an apocalyptic number.

201131742 is an abundant number, since it is smaller than the sum of its proper divisors (264144930).

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

201131742 is a wasteful number, since it uses less digits than its factorization.

201131742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57792.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 201131742 is about 14182.0922997984. The cubic root of 201131742 is about 585.9045513874.

Adding to 201131742 its reverse (247131102), we get a palindrome (448262844).

The spelling of 201131742 in words is "two hundred one million, one hundred thirty-one thousand, seven hundred forty-two".