30138202250 has 32 divisors (see below), whose sum is σ = 60758622288. Its totient is φ = 11127950400.

The previous prime is 30138202217. The next prime is 30138202253. The reversal of 30138202250 is 5220283103.

It can be written as a sum of positive squares in 8 ways, for example, as 611622361 + 29526579889 = 24731^2 + 171833^2 .

It is a super-2 number, since 2×30138202250² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (30138202253) 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 15 ways as a sum of consecutive naturals, for example, 4633397 + ... + 4639896.

Almost surely, 2^30138202250 is an apocalyptic number.

30138202250 is an abundant number, since it is smaller than the sum of its proper divisors (30620420038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30138202250 is a wasteful number, since it uses less digits than its factorization.

30138202250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9273323 (or 9273313 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 30138202250 its reverse (5220283103), we get a palindrome (35358485353).

The spelling of 30138202250 in words is "thirty billion, one hundred thirty-eight million, two hundred two thousand, two hundred fifty".