2101431440 has 40 divisors (see below), whose sum is σ = 4888615680. Its totient is φ = 840093056.

The previous prime is 2101431419. The next prime is 2101431461. The reversal of 2101431440 is 441341012.

It is an interprime number because it is at equal distance from previous prime (2101431419) and next prime (2101431461).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155681 + ... + 168639.

It is an arithmetic number, because the mean of its divisors is an integer number (122215392).

Almost surely, 2^2101431440 is an apocalyptic number.

2101431440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101431440 is an abundant number, since it is smaller than the sum of its proper divisors (2787184240).

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

2101431440 is a wasteful number, since it uses less digits than its factorization.

2101431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14999 (or 14993 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2101431440 is about 45841.3725797996. The cubic root of 2101431440 is about 1280.8700627494.

Adding to 2101431440 its reverse (441341012), we get a palindrome (2542772452).

The spelling of 2101431440 in words is "two billion, one hundred one million, four hundred thirty-one thousand, four hundred forty".