2115520340 has 12 divisors (see below), whose sum is σ = 4442592756. Its totient is φ = 846208128.

The previous prime is 2115520313. The next prime is 2115520349. The reversal of 2115520340 is 430255112.

It can be written as a sum of positive squares in 2 ways, for example, as 1065630736 + 1049889604 = 32644^2 + 32402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115520349) 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, 52887989 + ... + 52888028.

It is an arithmetic number, because the mean of its divisors is an integer number (370216063).

Almost surely, 2^2115520340 is an apocalyptic number.

2115520340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115520340 is an abundant number, since it is smaller than the sum of its proper divisors (2327072416).

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

2115520340 is a wasteful number, since it uses less digits than its factorization.

2115520340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105776026 (or 105776024 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2115520340 is about 45994.7860088510. The cubic root of 2115520340 is about 1283.7261905516.

Adding to 2115520340 its reverse (430255112), we get a palindrome (2545775452).

The spelling of 2115520340 in words is "two billion, one hundred fifteen million, five hundred twenty thousand, three hundred forty".