215041213 has 4 divisors (see below), whose sum is σ = 216229468. Its totient is φ = 213852960.

The previous prime is 215041207. The next prime is 215041243. The reversal of 215041213 is 312140512.

215041213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13344409 + 201696804 = 3653^2 + 14202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215041213 is a prime.

It is a super-2 number, since 2×215041213² = 92485446577022738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215041243) 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, 593856 + ... + 594217.

It is an arithmetic number, because the mean of its divisors is an integer number (54057367).

Almost surely, 2^215041213 is an apocalyptic number.

It is an amenable number.

215041213 is a deficient number, since it is larger than the sum of its proper divisors (1188255).

215041213 is a wasteful number, since it uses less digits than its factorization.

215041213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188254.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 215041213 is about 14664.2835829099. The cubic root of 215041213 is about 599.1109174637.

Adding to 215041213 its reverse (312140512), we get a palindrome (527181725).

The spelling of 215041213 in words is "two hundred fifteen million, forty-one thousand, two hundred thirteen".