305142224 has 10 divisors (see below), whose sum is σ = 591213090. Its totient is φ = 152571104.

The previous prime is 305142209. The next prime is 305142239. The reversal of 305142224 is 422241503.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (305142209) and next prime (305142239).

It can be written as a sum of positive squares in only one way, i.e., 169000000 + 136142224 = 13000^2 + 11668^2 .

It is a super-2 number, since 2×305142224² = 186223553735332352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 305142224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9535679 + ... + 9535710.

It is an arithmetic number, because the mean of its divisors is an integer number (59121309).

Almost surely, 2^305142224 is an apocalyptic number.

It is an amenable number.

305142224 is a deficient number, since it is larger than the sum of its proper divisors (286070866).

305142224 is a wasteful number, since it uses less digits than its factorization.

305142224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19071397 (or 19071391 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 305142224 is about 17468.3205832730. The cubic root of 305142224 is about 673.2361623873.

Adding to 305142224 its reverse (422241503), we get a palindrome (727383727).

The spelling of 305142224 in words is "three hundred five million, one hundred forty-two thousand, two hundred twenty-four".