305143252 has 6 divisors (see below), whose sum is σ = 534000698. Its totient is φ = 152571624.

The previous prime is 305143247. The next prime is 305143253. The reversal of 305143252 is 252341503.

It can be written as a sum of positive squares in only one way, i.e., 294671556 + 10471696 = 17166^2 + 3236^2 .

It is a super-2 number, since 2×305143252² = 186224808482271008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305143253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38142903 + ... + 38142910.

Almost surely, 2^305143252 is an apocalyptic number.

It is an amenable number.

305143252 is a deficient number, since it is larger than the sum of its proper divisors (228857446).

305143252 is a wasteful number, since it uses less digits than its factorization.

305143252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76285817 (or 76285815 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 305143252 is about 17468.3500079429. The cubic root of 305143252 is about 673.2369184129.

Adding to 305143252 its reverse (252341503), we get a palindrome (557484755).

The spelling of 305143252 in words is "three hundred five million, one hundred forty-three thousand, two hundred fifty-two".