215052340 has 12 divisors (see below), whose sum is σ = 451609956. Its totient is φ = 86020928.

The previous prime is 215052337. The next prime is 215052347. The reversal of 215052340 is 43250512.

It can be written as a sum of positive squares in 2 ways, for example, as 39012516 + 176039824 = 6246^2 + 13268^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215052347) 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, 5376289 + ... + 5376328.

It is an arithmetic number, because the mean of its divisors is an integer number (37634163).

Almost surely, 2^215052340 is an apocalyptic number.

215052340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215052340 is an abundant number, since it is smaller than the sum of its proper divisors (236557616).

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

215052340 is a wasteful number, since it uses less digits than its factorization.

215052340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752626 (or 10752624 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 215052340 is about 14664.6629691923. The cubic root of 215052340 is about 599.1212506647.

The spelling of 215052340 in words is "two hundred fifteen million, fifty-two thousand, three hundred forty".