305511142 has 8 divisors (see below), whose sum is σ = 459477000. Its totient is φ = 152352144.

The previous prime is 305511137. The next prime is 305511149. The reversal of 305511142 is 241115503.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×305511142² = 186674115772288328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305511149) 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, 200767 + ... + 202282.

It is an arithmetic number, because the mean of its divisors is an integer number (57434625).

Almost surely, 2^305511142 is an apocalyptic number.

305511142 is a deficient number, since it is larger than the sum of its proper divisors (153965858).

305511142 is a wasteful number, since it uses less digits than its factorization.

305511142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403430.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 305511142 is about 17478.8770234246. The cubic root of 305511142 is about 673.5073680670.

Adding to 305511142 its reverse (241115503), we get a palindrome (546626645).

The spelling of 305511142 in words is "three hundred five million, five hundred eleven thousand, one hundred forty-two".