512213225353442 has 4 divisors (see below), whose sum is σ = 768319838030166. Its totient is φ = 256106612676720.

The previous prime is 512213225353421. The next prime is 512213225353537. The reversal of 512213225353442 is 244353522312215.

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., 347412358278001 + 164800867075441 = 18639001^2 + 12837479^2 .

It is a junction number, because it is equal to n+sod(n) for n = 512213225353393 and 512213225353402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128053306338359 + ... + 128053306338362.

Almost surely, 2^{512213225353442} is an apocalyptic number.

512213225353442 is a deficient number, since it is larger than the sum of its proper divisors (256106612676724).

512213225353442 is a wasteful number, since it uses less digits than its factorization.

512213225353442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256106612676723.

The product of its digits is 1728000, while the sum is 44.

Adding to 512213225353442 its reverse (244353522312215), we get a palindrome (756566747665657).

The spelling of 512213225353442 in words is "five hundred twelve trillion, two hundred thirteen billion, two hundred twenty-five million, three hundred fifty-three thousand, four hundred forty-two".