213469 has 8 divisors (see below), whose sum is σ = 234360. Its totient is φ = 193536.

The previous prime is 213467. The next prime is 213481. The reversal of 213469 is 964312.

213469 = 38² + 39² + ... + 88².

It can be written as a sum of positive squares in 4 ways, for example, as 22500 + 190969 = 150^2 + 437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213469 - 2¹ = 213467 is a prime.

It is a super-2 number, since 2×213469² = 91138027922, 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 (213461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277 + ... + 709.

It is an arithmetic number, because the mean of its divisors is an integer number (29295).

2²¹³⁴⁶⁹ is an apocalyptic number.

213469 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

213469 is a deficient number, since it is larger than the sum of its proper divisors (20891).

213469 is a wasteful number, since it uses less digits than its factorization.

213469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its digits is 1296, while the sum is 25.

The square root of 213469 is about 462.0270554848. The cubic root of 213469 is about 59.7647267960.

Subtracting from 213469 its sum of digits (25), we obtain a square (213444 = 462²).

The spelling of 213469 in words is "two hundred thirteen thousand, four hundred sixty-nine".