351212521616 has 40 divisors (see below), whose sum is σ = 742969926048. Its totient is φ = 159505632000.

The previous prime is 351212521613. The next prime is 351212521619. The reversal of 351212521616 is 616125212153.

It is an interprime number because it is at equal distance from previous prime (351212521613) and next prime (351212521619).

It is not an unprimeable number, because it can be changed into a prime (351212521613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645965 + ... + 1058156.

Almost surely, 2^351212521616 is an apocalyptic number.

It is an amenable number.

351212521616 is an abundant number, since it is smaller than the sum of its proper divisors (391757404432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

351212521616 is a wasteful number, since it uses less digits than its factorization.

351212521616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705311 (or 1705305 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

Adding to 351212521616 its reverse (616125212153), we get a palindrome (967337733769).

The spelling of 351212521616 in words is "three hundred fifty-one billion, two hundred twelve million, five hundred twenty-one thousand, six hundred sixteen".