2131401040 has 80 divisors (see below), whose sum is σ = 5051462400. Its totient is φ = 836199936.

The previous prime is 2131401011. The next prime is 2131401059. The reversal of 2131401040 is 401041312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029126 + ... + 1031194.

It is an arithmetic number, because the mean of its divisors is an integer number (63143280).

Almost surely, 2^2131401040 is an apocalyptic number.

2131401040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131401040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2525731200).

2131401040 is an abundant number, since it is smaller than the sum of its proper divisors (2920061360).

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

2131401040 is a wasteful number, since it uses less digits than its factorization.

2131401040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2131401040 is about 46167.0991074813. The cubic root of 2131401040 is about 1286.9303935885.

Adding to 2131401040 its reverse (401041312), we get a palindrome (2532442352).

The spelling of 2131401040 in words is "two billion, one hundred thirty-one million, four hundred one thousand, forty".