2143155340 has 12 divisors (see below), whose sum is σ = 4500626256. Its totient is φ = 857262128.

The previous prime is 2143155307. The next prime is 2143155349. The reversal of 2143155340 is 435513412.

It is a super-2 number, since 2×2143155340² = 9186229622741031200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2143155299 and 2143155308.

It is not an unprimeable number, because it can be changed into a prime (2143155349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53578864 + ... + 53578903.

It is an arithmetic number, because the mean of its divisors is an integer number (375052188).

Almost surely, 2^2143155340 is an apocalyptic number.

2143155340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143155340 is an abundant number, since it is smaller than the sum of its proper divisors (2357470916).

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

2143155340 is a wasteful number, since it uses less digits than its factorization.

2143155340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107157776 (or 107157774 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2143155340 is about 46294.2257738479. The cubic root of 2143155340 is about 1289.2917892171.

Adding to 2143155340 its reverse (435513412), we get a palindrome (2578668752).

The spelling of 2143155340 in words is "two billion, one hundred forty-three million, one hundred fifty-five thousand, three hundred forty".