22751521 has 8 divisors (see below), whose sum is σ = 24917760. Its totient is φ = 20644752.

The previous prime is 22751513. The next prime is 22751539. The reversal of 22751521 is 12515722.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22751521 - 2³ = 22751513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22751591) 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 7 ways as a sum of consecutive naturals, for example, 14065 + ... + 15598.

It is an arithmetic number, because the mean of its divisors is an integer number (3114720).

Almost surely, 2^22751521 is an apocalyptic number.

It is an amenable number.

22751521 is a deficient number, since it is larger than the sum of its proper divisors (2166239).

22751521 is a wasteful number, since it uses less digits than its factorization.

22751521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29735.

The product of its digits is 1400, while the sum is 25.

The square root of 22751521 is about 4769.8554485435. The cubic root of 22751521 is about 283.3588699782.

The spelling of 22751521 in words is "twenty-two million, seven hundred fifty-one thousand, five hundred twenty-one".