30090213 has 24 divisors (see below), whose sum is σ = 45102200. Its totient is φ = 19315584.

The previous prime is 30090191. The next prime is 30090241. The reversal of 30090213 is 31209003.

It can be written as a sum of positive squares in 4 ways, for example, as 14265729 + 15824484 = 3777^2 + 3978^2 .

It is not a de Polignac number, because 30090213 - 2¹² = 30086117 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 (30090113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35883 + ... + 36711.

Almost surely, 2^30090213 is an apocalyptic number.

It is an amenable number.

30090213 is a deficient number, since it is larger than the sum of its proper divisors (15011987).

30090213 is a wasteful number, since it uses less digits than its factorization.

30090213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 30090213 is about 5485.4546757767. The cubic root of 30090213 is about 311.0343975491.

Adding to 30090213 its reverse (31209003), we get a palindrome (61299216).

It can be divided in two parts, 30090 and 213, that added together give a palindrome (30303).

The spelling of 30090213 in words is "thirty million, ninety thousand, two hundred thirteen".