201431344240 has 60 divisors (see below), whose sum is σ = 544789579896. Its totient is φ = 69062173824.

The previous prime is 201431344223. The next prime is 201431344241. The reversal of 201431344240 is 42443134102.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 201431344199 and 201431344208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201431344241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25688854 + ... + 25696693.

Almost surely, 2^201431344240 is an apocalyptic number.

201431344240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201431344240 is an abundant number, since it is smaller than the sum of its proper divisors (343358235656).

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

201431344240 is a wasteful number, since it uses less digits than its factorization.

201431344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51385574 (or 51385561 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 201431344240 its reverse (42443134102), we get a palindrome (243874478342).

The spelling of 201431344240 in words is "two hundred one billion, four hundred thirty-one million, three hundred forty-four thousand, two hundred forty".