305142550 has 12 divisors (see below), whose sum is σ = 567565236. Its totient is φ = 122057000.

The previous prime is 305142529. The next prime is 305142569. The reversal of 305142550 is 55241503.

It is a super-2 number, since 2×305142550² = 186223951641005000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3051376 + ... + 3051475.

It is an arithmetic number, because the mean of its divisors is an integer number (47297103).

Almost surely, 2^305142550 is an apocalyptic number.

305142550 is a deficient number, since it is larger than the sum of its proper divisors (262422686).

305142550 is a wasteful number, since it uses less digits than its factorization.

305142550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6102863 (or 6102858 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 305142550 is about 17468.3299144480. The cubic root of 305142550 is about 673.2364021388.

The spelling of 305142550 in words is "three hundred five million, one hundred forty-two thousand, five hundred fifty".