215320043 has 8 divisors (see below), whose sum is σ = 225060768. Its totient is φ = 205610944.

The previous prime is 215320037. The next prime is 215320073. The reversal of 215320043 is 340023512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215320043 - 2⁸ = 215319787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215319997 and 215320024.

It is not an unprimeable number, because it can be changed into a prime (215320003) 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, 6605 + ... + 21777.

It is an arithmetic number, because the mean of its divisors is an integer number (28132596).

Almost surely, 2^215320043 is an apocalyptic number.

215320043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

215320043 is a deficient number, since it is larger than the sum of its proper divisors (9740725).

215320043 is a wasteful number, since it uses less digits than its factorization.

215320043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15813.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 215320043 is about 14673.7876160179. The cubic root of 215320043 is about 599.3697483885.

Adding to 215320043 its reverse (340023512), we get a palindrome (555343555).

The spelling of 215320043 in words is "two hundred fifteen million, three hundred twenty thousand, forty-three".