213857469 has 32 divisors (see below), whose sum is σ = 362768640. Its totient is φ = 121974336.

The previous prime is 213857443. The next prime is 213857489. The reversal of 213857469 is 964758312.

213857469 is a `hidden beast` number, since 2 + 13 + 8 + 574 + 69 = 666.

It is not a de Polignac number, because 213857469 - 2⁷ = 213857341 is a prime.

It is a super-2 number, since 2×213857469² = 91470034094171922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213857429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190899 + ... + 192015.

It is an arithmetic number, because the mean of its divisors is an integer number (11336520).

Almost surely, 2^213857469 is an apocalyptic number.

It is an amenable number.

213857469 is a deficient number, since it is larger than the sum of its proper divisors (148911171).

213857469 is a wasteful number, since it uses less digits than its factorization.

213857469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2140 counting only the distinct ones).

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

The square root of 213857469 is about 14623.8664176065. The cubic root of 213857469 is about 598.0095793442.

The spelling of 213857469 in words is "two hundred thirteen million, eight hundred fifty-seven thousand, four hundred sixty-nine".