321510042145 has 16 divisors (see below), whose sum is σ = 398334117888. Its totient is φ = 248958783360.

The previous prime is 321510042137. The next prime is 321510042181. The reversal of 321510042145 is 541240015123.

It is not a de Polignac number, because 321510042145 - 2³ = 321510042137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6148539 + ... + 6200608.

It is an arithmetic number, because the mean of its divisors is an integer number (24895882368).

Almost surely, 2^321510042145 is an apocalyptic number.

It is an amenable number.

321510042145 is a deficient number, since it is larger than the sum of its proper divisors (76824075743).

321510042145 is a wasteful number, since it uses less digits than its factorization.

321510042145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12349320.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 321510042145 its reverse (541240015123), we get a palindrome (862750057268).

The spelling of 321510042145 in words is "three hundred twenty-one billion, five hundred ten million, forty-two thousand, one hundred forty-five".