21760525 has 12 divisors (see below), whose sum is σ = 27310752. Its totient is φ = 17197040.

The previous prime is 21760517. The next prime is 21760547. The reversal of 21760525 is 52506712.

It is not a de Polignac number, because 21760525 - 2³ = 21760517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21760493 and 21760502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3169 + ... + 7318.

It is an arithmetic number, because the mean of its divisors is an integer number (2275896).

Almost surely, 2^21760525 is an apocalyptic number.

21760525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21760525 is a deficient number, since it is larger than the sum of its proper divisors (5550227).

21760525 is a wasteful number, since it uses less digits than its factorization.

21760525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10580 (or 10575 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 21760525 is about 4664.8177885101. The cubic root of 21760525 is about 279.1835271122.

The spelling of 21760525 in words is "twenty-one million, seven hundred sixty thousand, five hundred twenty-five".