21325514 has 16 divisors (see below), whose sum is σ = 38708928. Its totient is φ = 8601792.

The previous prime is 21325511. The next prime is 21325553. The reversal of 21325514 is 41552312.

It is a self number, because there is not a number n which added to its sum of digits gives 21325514.

It is not an unprimeable number, because it can be changed into a prime (21325511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44564 + ... + 45039.

It is an arithmetic number, because the mean of its divisors is an integer number (2419308).

Almost surely, 2^21325514 is an apocalyptic number.

21325514 is a deficient number, since it is larger than the sum of its proper divisors (17383414).

21325514 is a wasteful number, since it uses less digits than its factorization.

21325514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89629.

The product of its digits is 1200, while the sum is 23.

The square root of 21325514 is about 4617.9556082752. The cubic root of 21325514 is about 277.3106204561.

Adding to 21325514 its reverse (41552312), we get a palindrome (62877826).

The spelling of 21325514 in words is "twenty-one million, three hundred twenty-five thousand, five hundred fourteen".