7138213 has 4 divisors (see below), whose sum is σ = 7168320. Its totient is φ = 7108108.

The previous prime is 7138207. The next prime is 7138217. The reversal of 7138213 is 3128317.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3128317 = 29 ⋅107873.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7138213 is a prime.

It is a super-3 number, since 3×7138213³ (a number of 22 digits) contains 333 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 (7138217) 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, 14695 + ... + 15172.

It is an arithmetic number, because the mean of its divisors is an integer number (1792080).

Almost surely, 2^7138213 is an apocalyptic number.

It is an amenable number.

7138213 is a deficient number, since it is larger than the sum of its proper divisors (30107).

7138213 is a wasteful number, since it uses less digits than its factorization.

7138213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30106.

The product of its digits is 1008, while the sum is 25.

The square root of 7138213 is about 2671.7434382815. The cubic root of 7138213 is about 192.5439310542.

The spelling of 7138213 in words is "seven million, one hundred thirty-eight thousand, two hundred thirteen".