21231650325 has 24 divisors (see below), whose sum is σ = 35583867328. Its totient is φ = 11168426880.

The previous prime is 21231650311. The next prime is 21231650329. The reversal of 21231650325 is 52305613212.

It is not a de Polignac number, because 21231650325 - 2⁷ = 21231650197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231650292 and 21231650301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231650329) 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, 1933489 + ... + 1944438.

Almost surely, 2^21231650325 is an apocalyptic number.

21231650325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21231650325 is a deficient number, since it is larger than the sum of its proper divisors (14352217003).

21231650325 is a wasteful number, since it uses less digits than its factorization.

21231650325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878013 (or 3878008 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21231650325 in words is "twenty-one billion, two hundred thirty-one million, six hundred fifty thousand, three hundred twenty-five".