30252021 has 16 divisors (see below), whose sum is σ = 40974336. Its totient is φ = 19851776.

The previous prime is 30251999. The next prime is 30252037. The reversal of 30252021 is 12025203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30252021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30252071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78796 + ... + 79178.

It is an arithmetic number, because the mean of its divisors is an integer number (2560896).

Almost surely, 2^30252021 is an apocalyptic number.

It is an amenable number.

30252021 is a deficient number, since it is larger than the sum of its proper divisors (10722315).

30252021 is a wasteful number, since it uses less digits than its factorization.

30252021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 30252021 is about 5500.1837242041. The cubic root of 30252021 is about 311.5909230307.

Adding to 30252021 its reverse (12025203), we get a palindrome (42277224).

It can be divided in two parts, 3025202 and 1, that added together give a palindrome (3025203).

The spelling of 30252021 in words is "thirty million, two hundred fifty-two thousand, twenty-one".