22025451 has 24 divisors (see below), whose sum is σ = 34350480. Its totient is φ = 12516672.

The previous prime is 22025441. The next prime is 22025459. The reversal of 22025451 is 15452022.

It is a happy number.

It is not a de Polignac number, because 22025451 - 2¹⁸ = 21763307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22025459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39265 + ... + 39821.

It is an arithmetic number, because the mean of its divisors is an integer number (1431270).

Almost surely, 2^22025451 is an apocalyptic number.

22025451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22025451 is a deficient number, since it is larger than the sum of its proper divisors (12325029).

22025451 is a wasteful number, since it uses less digits than its factorization.

22025451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 22025451 is about 4693.1280613254. The cubic root of 22025451 is about 280.3119440052.

Adding to 22025451 its reverse (15452022), we get a palindrome (37477473).

The spelling of 22025451 in words is "twenty-two million, twenty-five thousand, four hundred fifty-one".