30402213 has 4 divisors (see below), whose sum is σ = 40536288. Its totient is φ = 20268140.

The previous prime is 30402209. The next prime is 30402257. The reversal of 30402213 is 31220403.

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: 31220403 = 3 ⋅10406801.

It is a cyclic number.

It is not a de Polignac number, because 30402213 - 2² = 30402209 is a prime.

It is a super-4 number, since 4×30402213⁴ (a number of 31 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30402192 and 30402201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30402263) 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, 5067033 + ... + 5067038.

It is an arithmetic number, because the mean of its divisors is an integer number (10134072).

Almost surely, 2^30402213 is an apocalyptic number.

It is an amenable number.

30402213 is a deficient number, since it is larger than the sum of its proper divisors (10134075).

30402213 is a wasteful number, since it uses less digits than its factorization.

30402213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10134074.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 30402213 is about 5513.8201820516. The cubic root of 30402213 is about 312.1057231289.

Adding to 30402213 its reverse (31220403), we get a palindrome (61622616).

It can be divided in two parts, 3040 and 2213, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 30402213 in words is "thirty million, four hundred two thousand, two hundred thirteen".