21962825 has 6 divisors (see below), whose sum is σ = 27233934. Its totient is φ = 17570240.

The previous prime is 21962819. The next prime is 21962833. The reversal of 21962825 is 52826912.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3575881 + 18386944 = 1891^2 + 4288^2 .

It is not a de Polignac number, because 21962825 - 2⁶ = 21962761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 439232 + ... + 439281.

It is an arithmetic number, because the mean of its divisors is an integer number (4538989).

Almost surely, 2^21962825 is an apocalyptic number.

21962825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21962825 is a deficient number, since it is larger than the sum of its proper divisors (5271109).

21962825 is an equidigital number, since it uses as much as digits as its factorization.

21962825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878523 (or 878518 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 21962825 is about 4686.4512160056. The cubic root of 21962825 is about 280.0460170967.

The spelling of 21962825 in words is "twenty-one million, nine hundred sixty-two thousand, eight hundred twenty-five".