22750421 has 2 divisors, whose sum is σ = 22750422. Its totient is φ = 22750420.

The previous prime is 22750417. The next prime is 22750423. The reversal of 22750421 is 12405722.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 9891025 = 3586^2 + 3145^2 .

It is a cyclic number.

It is not a de Polignac number, because 22750421 - 2² = 22750417 is a prime.

Together with 22750423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22750423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11375210 + 11375211.

It is an arithmetic number, because the mean of its divisors is an integer number (11375211).

Almost surely, 2^22750421 is an apocalyptic number.

It is an amenable number.

22750421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22750421 is an equidigital number, since it uses as much as digits as its factorization.

22750421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 22750421 is about 4769.7401396722. The cubic root of 22750421 is about 283.3543032538.

The spelling of 22750421 in words is "twenty-two million, seven hundred fifty thousand, four hundred twenty-one".