30402133 has 4 divisors (see below), whose sum is σ = 30743820. Its totient is φ = 30060448.

The previous prime is 30402131. The next prime is 30402139. The reversal of 30402133 is 33120403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10125124 + 20277009 = 3182^2 + 4503^2 .

It is a cyclic number.

It is not a de Polignac number, because 30402133 - 2¹ = 30402131 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 (30402131) 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, 170710 + ... + 170887.

It is an arithmetic number, because the mean of its divisors is an integer number (7685955).

Almost surely, 2^30402133 is an apocalyptic number.

It is an amenable number.

30402133 is a deficient number, since it is larger than the sum of its proper divisors (341687).

30402133 is an equidigital number, since it uses as much as digits as its factorization.

30402133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341686.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 30402133 is about 5513.8129275484. The cubic root of 30402133 is about 312.1054493717.

Adding to 30402133 its reverse (33120403), we get a palindrome (63522536).

The spelling of 30402133 in words is "thirty million, four hundred two thousand, one hundred thirty-three".