215738469 has 12 divisors (see below), whose sum is σ = 311790336. Its totient is φ = 143748072.

The previous prime is 215738447. The next prime is 215738473. The reversal of 215738469 is 964837512.

215738469 is a `hidden beast` number, since 2 + 157 + 38 + 469 = 666.

It is not a de Polignac number, because 215738469 - 2¹¹ = 215736421 is a prime.

It is a super-2 number, since 2×215738469² = 93086174012927922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215738489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14844 + ... + 25530.

It is an arithmetic number, because the mean of its divisors is an integer number (25982528).

Almost surely, 2^215738469 is an apocalyptic number.

It is an amenable number.

215738469 is a deficient number, since it is larger than the sum of its proper divisors (96051867).

215738469 is a wasteful number, since it uses less digits than its factorization.

215738469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12936 (or 12933 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 215738469 is about 14688.0382965187. The cubic root of 215738469 is about 599.7577438664.

The spelling of 215738469 in words is "two hundred fifteen million, seven hundred thirty-eight thousand, four hundred sixty-nine".