215435223420155 has 16 divisors (see below), whose sum is σ = 260387079067584. Its totient is φ = 171107485503360.

The previous prime is 215435223420133. The next prime is 215435223420169. The reversal of 215435223420155 is 551024322534512.

It is a de Polignac number, because none of the positive numbers 2^k-215435223420155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156443732 + ... + 157814801.

It is an arithmetic number, because the mean of its divisors is an integer number (16274192441724).

Almost surely, 2^{215435223420155} is an apocalyptic number.

215435223420155 is a deficient number, since it is larger than the sum of its proper divisors (44951855647429).

215435223420155 is a wasteful number, since it uses less digits than its factorization.

215435223420155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314259526.

The product of its (nonzero) digits is 1440000, while the sum is 44.

Adding to 215435223420155 its reverse (551024322534512), we get a palindrome (766459545954667).

The spelling of 215435223420155 in words is "two hundred fifteen trillion, four hundred thirty-five billion, two hundred twenty-three million, four hundred twenty thousand, one hundred fifty-five".