213124133 has 4 divisors (see below), whose sum is σ = 213275328. Its totient is φ = 212972940.

The previous prime is 213124123. The next prime is 213124147. The reversal of 213124133 is 331421312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213124133 - 2¹⁴ = 213107749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213124123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73463 + ... + 76308.

It is an arithmetic number, because the mean of its divisors is an integer number (53318832).

Almost surely, 2^213124133 is an apocalyptic number.

It is an amenable number.

213124133 is a deficient number, since it is larger than the sum of its proper divisors (151195).

213124133 is a wasteful number, since it uses less digits than its factorization.

213124133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151194.

The product of its digits is 432, while the sum is 20.

The square root of 213124133 is about 14598.7716264075. The cubic root of 213124133 is about 597.3252541278.

Adding to 213124133 its reverse (331421312), we get a palindrome (544545445).

The spelling of 213124133 in words is "two hundred thirteen million, one hundred twenty-four thousand, one hundred thirty-three".