215030570243 has 4 divisors (see below), whose sum is σ = 215102274000. Its totient is φ = 214958866488.

The previous prime is 215030570239. The next prime is 215030570257. The reversal of 215030570243 is 342075030512.

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

It is a cyclic number.

It is not a de Polignac number, because 215030570243 - 2² = 215030570239 is a prime.

It is a super-2 number, since 2×215030570243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215030570143) 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, 35847380 + ... + 35853377.

It is an arithmetic number, because the mean of its divisors is an integer number (53775568500).

Almost surely, 2^215030570243 is an apocalyptic number.

215030570243 is a deficient number, since it is larger than the sum of its proper divisors (71703757).

215030570243 is an equidigital number, since it uses as much as digits as its factorization.

215030570243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71703756.

The product of its (nonzero) digits is 25200, while the sum is 32.

The spelling of 215030570243 in words is "two hundred fifteen billion, thirty million, five hundred seventy thousand, two hundred forty-three".