30120000251 has 16 divisors (see below), whose sum is σ = 33109026048. Its totient is φ = 27173580000.

The previous prime is 30120000247. The next prime is 30120000263. The reversal of 30120000251 is 15200002103.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 30120000251 - 2² = 30120000247 is a prime.

It is a super-3 number, since 3×30120000251³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30120000751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745106 + ... + 784488.

It is an arithmetic number, because the mean of its divisors is an integer number (2069314128).

Almost surely, 2^30120000251 is an apocalyptic number.

30120000251 is a deficient number, since it is larger than the sum of its proper divisors (2989025797).

30120000251 is a wasteful number, since it uses less digits than its factorization.

30120000251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39922.

The product of its (nonzero) digits is 60, while the sum is 14.

Adding to 30120000251 its reverse (15200002103), we get a palindrome (45320002354).

The spelling of 30120000251 in words is "thirty billion, one hundred twenty million, two hundred fifty-one", and thus it is an aban number.