30051021 has 32 divisors (see below), whose sum is σ = 53803008. Its totient is φ = 14408640.

The previous prime is 30051017. The next prime is 30051029. The reversal of 30051021 is 12015003.

30051021 = 363² + 364² + ... + 516².

It is not a de Polignac number, because 30051021 - 2² = 30051017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30050988 and 30051006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30051029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2001 + ... + 8006.

It is an arithmetic number, because the mean of its divisors is an integer number (1681344).

Almost surely, 2^30051021 is an apocalyptic number.

It is an amenable number.

30051021 is a deficient number, since it is larger than the sum of its proper divisors (23751987).

30051021 is a wasteful number, since it uses less digits than its factorization.

30051021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10041.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 30051021 is about 5481.8811552240. The cubic root of 30051021 is about 310.8992998415.

Adding to 30051021 its reverse (12015003), we get a palindrome (42066024).

The spelling of 30051021 in words is "thirty million, fifty-one thousand, twenty-one".