30220251 has 8 divisors (see below), whose sum is σ = 40327680. Its totient is φ = 20129832.

The previous prime is 30220219. The next prime is 30220273. The reversal of 30220251 is 15202203.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30220251 - 2⁵ = 30220219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30220251.

It is not an unprimeable number, because it can be changed into a prime (30221251) 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 7 ways as a sum of consecutive naturals, for example, 730 + ... + 7808.

It is an arithmetic number, because the mean of its divisors is an integer number (5040960).

Almost surely, 2^30220251 is an apocalyptic number.

30220251 is a deficient number, since it is larger than the sum of its proper divisors (10107429).

30220251 is a wasteful number, since it uses less digits than its factorization.

30220251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8505.

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

The square root of 30220251 is about 5497.2948802115. The cubic root of 30220251 is about 311.4818095385.

Adding to 30220251 its reverse (15202203), we get a palindrome (45422454).

It can be divided in two parts, 302202 and 51, that added together give a triangular number (302253 = T₇₇₇).

The spelling of 30220251 in words is "thirty million, two hundred twenty thousand, two hundred fifty-one".