215243336040 has 32 divisors (see below), whose sum is σ = 645730008480. Its totient is φ = 57398222912.

The previous prime is 215243336023. The next prime is 215243336101. The reversal of 215243336040 is 40633342512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 215243335992 and 215243336010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896847114 + ... + 896847353.

It is an arithmetic number, because the mean of its divisors is an integer number (20179062765).

Almost surely, 2^215243336040 is an apocalyptic number.

215243336040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215243336040 is an abundant number, since it is smaller than the sum of its proper divisors (430486672440).

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

215243336040 is a wasteful number, since it uses less digits than its factorization.

215243336040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793694481 (or 1793694477 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 215243336040 its reverse (40633342512), we get a palindrome (255876678552).

The spelling of 215243336040 in words is "two hundred fifteen billion, two hundred forty-three million, three hundred thirty-six thousand, forty".