215318862340 has 24 divisors (see below), whose sum is σ = 457250172120. Its totient is φ = 85159819008.

The previous prime is 215318862313. The next prime is 215318862347. The reversal of 215318862340 is 43268813512.

It can be written as a sum of positive squares in 4 ways, for example, as 7973418436 + 207345443904 = 89294^2 + 455352^2 .

It is not an unprimeable number, because it can be changed into a prime (215318862347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60481047 + ... + 60484606.

It is an arithmetic number, because the mean of its divisors is an integer number (19052090505).

Almost surely, 2^215318862340 is an apocalyptic number.

215318862340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215318862340 is an abundant number, since it is smaller than the sum of its proper divisors (241931309780).

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

215318862340 is a wasteful number, since it uses less digits than its factorization.

215318862340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120965751 (or 120965749 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 215318862340 in words is "two hundred fifteen billion, three hundred eighteen million, eight hundred sixty-two thousand, three hundred forty".