215030534135 has 4 divisors (see below), whose sum is σ = 258036640968. Its totient is φ = 172024427304.

The previous prime is 215030534123. The next prime is 215030534137. The reversal of 215030534135 is 531435030512.

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 215030534135 - 2²⁸ = 214762098679 is a prime.

It is a super-2 number, since 2×215030534135² (a number of 23 digits) 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 (215030534137) 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, 21503053409 + ... + 21503053418.

It is an arithmetic number, because the mean of its divisors is an integer number (64509160242).

Almost surely, 2^215030534135 is an apocalyptic number.

215030534135 is a deficient number, since it is larger than the sum of its proper divisors (43006106833).

215030534135 is an equidigital number, since it uses as much as digits as its factorization.

215030534135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43006106832.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 215030534135 its reverse (531435030512), we get a palindrome (746465564647).

The spelling of 215030534135 in words is "two hundred fifteen billion, thirty million, five hundred thirty-four thousand, one hundred thirty-five".