30490213 has 4 divisors (see below), whose sum is σ = 32835628. Its totient is φ = 28144800.

The previous prime is 30490199. The next prime is 30490237. The reversal of 30490213 is 31209403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31209403 = 3433 ⋅9091.

It can be written as a sum of positive squares in 2 ways, for example, as 16785409 + 13704804 = 4097^2 + 3702^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30490213 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 (30490283) 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, 1172688 + ... + 1172713.

It is an arithmetic number, because the mean of its divisors is an integer number (8208907).

Almost surely, 2^30490213 is an apocalyptic number.

It is an amenable number.

30490213 is a deficient number, since it is larger than the sum of its proper divisors (2345415).

30490213 is a wasteful number, since it uses less digits than its factorization.

30490213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345414.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 30490213 is about 5521.7943641537. The cubic root of 30490213 is about 312.4065657736.

Adding to 30490213 its reverse (31209403), we get a palindrome (61699616).

It can be divided in two parts, 30490 and 213, that added together give a palindrome (30703).

The spelling of 30490213 in words is "thirty million, four hundred ninety thousand, two hundred thirteen".