2231728321265 has 32 divisors (see below), whose sum is σ = 2864785397760. Its totient is φ = 1663088477184.

The previous prime is 2231728321253. The next prime is 2231728321271. The reversal of 2231728321265 is 5621238271322.

It is a de Polignac number, because none of the positive numbers 2^k-2231728321265 is a prime.

It is a super-3 number, since 3×2231728321265³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15327587 + ... + 15472503.

It is an arithmetic number, because the mean of its divisors is an integer number (89524543680).

Almost surely, 2^{2231728321265} is an apocalyptic number.

It is an amenable number.

2231728321265 is a deficient number, since it is larger than the sum of its proper divisors (633057076495).

2231728321265 is a wasteful number, since it uses less digits than its factorization.

2231728321265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146801.

The product of its digits is 483840, while the sum is 44.

The spelling of 2231728321265 in words is "two trillion, two hundred thirty-one billion, seven hundred twenty-eight million, three hundred twenty-one thousand, two hundred sixty-five".