30222281 has 4 divisors (see below), whose sum is σ = 30248064. Its totient is φ = 30196500.

The previous prime is 30222271. The next prime is 30222287. The reversal of 30222281 is 18222203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18222203 = 31 ⋅587813.

It is a cyclic number.

It is not a de Polignac number, because 30222281 - 2²² = 26027977 is a prime.

It is a super-2 number, since 2×30222281² = 1826772537685922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30222287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11045 + ... + 13506.

It is an arithmetic number, because the mean of its divisors is an integer number (7562016).

Almost surely, 2^30222281 is an apocalyptic number.

It is an amenable number.

30222281 is a deficient number, since it is larger than the sum of its proper divisors (25783).

30222281 is a wasteful number, since it uses less digits than its factorization.

30222281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25782.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 30222281 is about 5497.4795133770. The cubic root of 30222281 is about 311.4887838234.

Adding to 30222281 its reverse (18222203), we get a palindrome (48444484).

It can be divided in two parts, 30222 and 281, that added together give a palindrome (30503).

The spelling of 30222281 in words is "thirty million, two hundred twenty-two thousand, two hundred eighty-one".