30520222 has 4 divisors (see below), whose sum is σ = 45780336. Its totient is φ = 15260110.

The previous prime is 30520207. The next prime is 30520223. The reversal of 30520222 is 22202503.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22202503 = 4691 ⋅4733.

It is a junction number, because it is equal to n+sod(n) for n = 30520196 and 30520205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30520223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7630054 + ... + 7630057.

It is an arithmetic number, because the mean of its divisors is an integer number (11445084).

Almost surely, 2^30520222 is an apocalyptic number.

30520222 is a deficient number, since it is larger than the sum of its proper divisors (15260114).

30520222 is a wasteful number, since it uses less digits than its factorization.

30520222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15260113.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 30520222 is about 5524.5110190858. The cubic root of 30520222 is about 312.5090241661.

Adding to 30520222 its reverse (22202503), we get a palindrome (52722725).

The spelling of 30520222 in words is "thirty million, five hundred twenty thousand, two hundred twenty-two".