21835325 has 12 divisors (see below), whose sum is σ = 27135168. Its totient is φ = 17430000.

The previous prime is 21835321. The next prime is 21835339. The reversal of 21835325 is 52353812.

It is not a de Polignac number, because 21835325 - 2² = 21835321 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21835321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18194 + ... + 19356.

It is an arithmetic number, because the mean of its divisors is an integer number (2261264).

Almost surely, 2^21835325 is an apocalyptic number.

21835325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21835325 is a deficient number, since it is larger than the sum of its proper divisors (5299843).

21835325 is a wasteful number, since it uses less digits than its factorization.

21835325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1919 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 21835325 is about 4672.8283726240. The cubic root of 21835325 is about 279.5030513522.

It can be divided in two parts, 218 and 35325, that multiplied together give a triangular number (7700850 = T₃₉₂₄).

The spelling of 21835325 in words is "twenty-one million, eight hundred thirty-five thousand, three hundred twenty-five".