215104311 has 6 divisors (see below), whose sum is σ = 310706240. Its totient is φ = 143402868.

The previous prime is 215104291. The next prime is 215104313. The reversal of 215104311 is 113401512.

It is not a de Polignac number, because 215104311 - 2⁹ = 215103799 is a prime.

It is a super-2 number, since 2×215104311² = 92539729221569442, 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 (215104313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11950231 + ... + 11950248.

Almost surely, 2^215104311 is an apocalyptic number.

215104311 is a deficient number, since it is larger than the sum of its proper divisors (95601929).

215104311 is a wasteful number, since it uses less digits than its factorization.

215104311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23900485 (or 23900482 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 215104311 is about 14666.4348428648. The cubic root of 215104311 is about 599.1695093391.

Adding to 215104311 its reverse (113401512), we get a palindrome (328505823).

The spelling of 215104311 in words is "two hundred fifteen million, one hundred four thousand, three hundred eleven".