305210040342442 has 4 divisors (see below), whose sum is σ = 457815060513666. Its totient is φ = 152605020171220.

The previous prime is 305210040342439. The next prime is 305210040342469. The reversal of 305210040342442 is 244243040012503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 171566013019041 + 133644027323401 = 13098321^2 + 11560451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 305210040342398 and 305210040342407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76302510085609 + ... + 76302510085612.

Almost surely, 2^{305210040342442} is an apocalyptic number.

305210040342442 is a deficient number, since it is larger than the sum of its proper divisors (152605020171224).

305210040342442 is a wasteful number, since it uses less digits than its factorization.

305210040342442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152605020171223.

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 305210040342442 its reverse (244243040012503), we get a palindrome (549453080354945).

The spelling of 305210040342442 in words is "three hundred five trillion, two hundred ten billion, forty million, three hundred forty-two thousand, four hundred forty-two".