30220451 has 4 divisors (see below), whose sum is σ = 30236352. Its totient is φ = 30204552.

The previous prime is 30220429. The next prime is 30220457. The reversal of 30220451 is 15402203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15402203 = 23 ⋅669661.

It is a cyclic number.

It is not a de Polignac number, because 30220451 - 2⁶ = 30220387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30220457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4640 + ... + 9053.

It is an arithmetic number, because the mean of its divisors is an integer number (7559088).

Almost surely, 2^30220451 is an apocalyptic number.

30220451 is a deficient number, since it is larger than the sum of its proper divisors (15901).

30220451 is a wasteful number, since it uses less digits than its factorization.

30220451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 30220451 is about 5497.3130709466. The cubic root of 30220451 is about 311.4824966741.

Adding to 30220451 its reverse (15402203), we get a palindrome (45622654).

The spelling of 30220451 in words is "thirty million, two hundred twenty thousand, four hundred fifty-one".