30000051 has 12 divisors (see below), whose sum is σ = 44938712. Its totient is φ = 19999872.

The previous prime is 30000049. The next prime is 30000059. The reversal of 30000051 is 15000003.

It is not a de Polignac number, because 30000051 - 2¹ = 30000049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29999988 and 30000042.

It is not an unprimeable number, because it can be changed into a prime (30000059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61486 + ... + 61971.

Almost surely, 2^30000051 is an apocalyptic number.

30000051 is a deficient number, since it is larger than the sum of its proper divisors (14938661).

30000051 is an equidigital number, since it uses as much as digits as its factorization.

30000051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123472 (or 123460 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 9.

The square root of 30000051 is about 5477.2302306914. The cubic root of 30000051 is about 310.7234266718.

Adding to 30000051 its reverse (15000003), we get a palindrome (45000054).

The spelling of 30000051 in words is "thirty million, fifty-one", and thus it is an aban number and an uban number.