213898 has 4 divisors (see below), whose sum is σ = 320850. Its totient is φ = 106948.

The previous prime is 213887. The next prime is 213901. The reversal of 213898 is 898312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 178929 + 34969 = 423^2 + 187^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53473 + ... + 53476.

2²¹³⁸⁹⁸ is an apocalyptic number.

213898 is a deficient number, since it is larger than the sum of its proper divisors (106952).

213898 is a wasteful number, since it uses less digits than its factorization.

213898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106951.

The product of its digits is 3456, while the sum is 31.

The square root of 213898 is about 462.4910809951. The cubic root of 213898 is about 59.8047355899.

It can be divided in two parts, 213 and 898, that added together give a palindrome (1111).

The spelling of 213898 in words is "two hundred thirteen thousand, eight hundred ninety-eight".