215262340 has 12 divisors (see below), whose sum is σ = 452050956. Its totient is φ = 86104928.

The previous prime is 215262323. The next prime is 215262349. The reversal of 215262340 is 43262512.

It can be written as a sum of positive squares in 2 ways, for example, as 103917636 + 111344704 = 10194^2 + 10552^2 .

It is not an unprimeable number, because it can be changed into a prime (215262349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5381539 + ... + 5381578.

It is an arithmetic number, because the mean of its divisors is an integer number (37670913).

Almost surely, 2^215262340 is an apocalyptic number.

215262340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215262340 is an abundant number, since it is smaller than the sum of its proper divisors (236788616).

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

215262340 is a wasteful number, since it uses less digits than its factorization.

215262340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10763126 (or 10763124 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 215262340 is about 14671.8212911690. The cubic root of 215262340 is about 599.3162024791.

The spelling of 215262340 in words is "two hundred fifteen million, two hundred sixty-two thousand, three hundred forty".