2321821667725 has 24 divisors (see below), whose sum is σ = 3296644427840. Its totient is φ = 1589062043520.

The previous prime is 2321821667719. The next prime is 2321821667729. The reversal of 2321821667725 is 5277661281232.

It is not a de Polignac number, because 2321821667725 - 2²¹ = 2321819570573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321821667729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12592560 + ... + 12775609.

Almost surely, 2^{2321821667725} is an apocalyptic number.

2321821667725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2321821667725 is a deficient number, since it is larger than the sum of its proper divisors (974822760115).

2321821667725 is a wasteful number, since it uses less digits than its factorization.

2321821667725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25368709 (or 25368704 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 52.

The spelling of 2321821667725 in words is "two trillion, three hundred twenty-one billion, eight hundred twenty-one million, six hundred sixty-seven thousand, seven hundred twenty-five".