2102312440 has 32 divisors (see below), whose sum is σ = 4732182000. Its totient is φ = 840573184.

The previous prime is 2102312423. The next prime is 2102312477. The reversal of 2102312440 is 442132012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99531 + ... + 118789.

Almost surely, 2^2102312440 is an apocalyptic number.

2102312440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102312440 is an abundant number, since it is smaller than the sum of its proper divisors (2629869560).

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

2102312440 is a wasteful number, since it uses less digits than its factorization.

2102312440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21999 (or 21995 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2102312440 is about 45850.9807964890. The cubic root of 2102312440 is about 1281.0490342265.

Adding to 2102312440 its reverse (442132012), we get a palindrome (2544444452).

The spelling of 2102312440 in words is "two billion, one hundred two million, three hundred twelve thousand, four hundred forty".