215296540 has 12 divisors (see below), whose sum is σ = 452122776. Its totient is φ = 86118608.

The previous prime is 215296489. The next prime is 215296541. The reversal of 215296540 is 45692512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 215296496 and 215296505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215296541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5382394 + ... + 5382433.

It is an arithmetic number, because the mean of its divisors is an integer number (37676898).

Almost surely, 2^215296540 is an apocalyptic number.

215296540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215296540 is an abundant number, since it is smaller than the sum of its proper divisors (236826236).

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

215296540 is a wasteful number, since it uses less digits than its factorization.

215296540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10764836 (or 10764834 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 215296540 is about 14672.9867443544. The cubic root of 215296540 is about 599.3479397673.

The spelling of 215296540 in words is "two hundred fifteen million, two hundred ninety-six thousand, five hundred forty".