21701325 has 48 divisors (see below), whose sum is σ = 38400320. Its totient is φ = 10782720.

The previous prime is 21701297. The next prime is 21701371. The reversal of 21701325 is 52310712.

It is not a de Polignac number, because 21701325 - 2⁶ = 21701261 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138147 + ... + 138303.

Almost surely, 2^21701325 is an apocalyptic number.

21701325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21701325 is a deficient number, since it is larger than the sum of its proper divisors (16698995).

21701325 is a wasteful number, since it uses less digits than its factorization.

21701325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 21701325 is about 4658.4680958444. The cubic root of 21701325 is about 278.9301221436.

The spelling of 21701325 in words is "twenty-one million, seven hundred one thousand, three hundred twenty-five".