201131032440 has 128 divisors (see below), whose sum is σ = 660460852800. Its totient is φ = 48697528320.

The previous prime is 201131032439. The next prime is 201131032441. The reversal of 201131032440 is 44230131102.

It is an interprime number because it is at equal distance from previous prime (201131032439) and next prime (201131032441).

It is a super-4 number, since 4×201131032440⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201131032441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 961645 + ... + 1151964.

Almost surely, 2^201131032440 is an apocalyptic number.

201131032440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201131032440 is an abundant number, since it is smaller than the sum of its proper divisors (459329820360).

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

201131032440 is a wasteful number, since it uses less digits than its factorization.

201131032440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113697 (or 2113693 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 201131032440 its reverse (44230131102), we get a palindrome (245361163542).

The spelling of 201131032440 in words is "two hundred one billion, one hundred thirty-one million, thirty-two thousand, four hundred forty".