213124 has 6 divisors (see below), whose sum is σ = 372974. Its totient is φ = 106560.

The previous prime is 213119. The next prime is 213131. The reversal of 213124 is 421312.

213124 is nontrivially palindromic in base 15.

213124 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 184900 + 28224 = 430^2 + 168^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26637 + ... + 26644.

2²¹³¹²⁴ is an apocalyptic number.

It is an amenable number.

213124 is a deficient number, since it is larger than the sum of its proper divisors (159850).

213124 is a wasteful number, since it uses less digits than its factorization.

213124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53285 (or 53283 counting only the distinct ones).

The product of its digits is 48, while the sum is 13.

The square root of 213124 is about 461.6535497535. The cubic root of 213124 is about 59.7325129874.

Adding to 213124 its reverse (421312), we get a palindrome (634436).

It can be divided in two parts, 21312 and 4, that added together give a square (21316 = 146²).

The spelling of 213124 in words is "two hundred thirteen thousand, one hundred twenty-four".