213455 has 8 divisors (see below), whose sum is σ = 279504. Its totient is φ = 155200.

The previous prime is 213449. The next prime is 213461. The reversal of 213455 is 554312.

It is an interprime number because it is at equal distance from previous prime (213449) and next prime (213461).

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

It is not a de Polignac number, because 213455 - 2⁶ = 213391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1886 + ... + 1995.

It is an arithmetic number, because the mean of its divisors is an integer number (34938).

2²¹³⁴⁵⁵ is an apocalyptic number.

213455 is a deficient number, since it is larger than the sum of its proper divisors (66049).

213455 is a wasteful number, since it uses less digits than its factorization.

213455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897.

The product of its digits is 600, while the sum is 20.

The square root of 213455 is about 462.0119046085. The cubic root of 213455 is about 59.7634202449.

Adding to 213455 its reverse (554312), we get a palindrome (767767).

It can be divided in two parts, 2134 and 55, that multiplied together give a triangular number (117370 = T₄₈₄).

The spelling of 213455 in words is "two hundred thirteen thousand, four hundred fifty-five".