22719401 has 2 divisors, whose sum is σ = 22719402. Its totient is φ = 22719400.

The previous prime is 22719397. The next prime is 22719409. The reversal of 22719401 is 10491722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22316176 + 403225 = 4724^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 22719401 - 2² = 22719397 is a prime.

It is not a weakly prime, because it can be changed into another prime (22719409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11359700 + 11359701.

It is an arithmetic number, because the mean of its divisors is an integer number (11359701).

Almost surely, 2^22719401 is an apocalyptic number.

It is an amenable number.

22719401 is a deficient number, since it is larger than the sum of its proper divisors (1).

22719401 is an equidigital number, since it uses as much as digits as its factorization.

22719401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 22719401 is about 4766.4872810068. The cubic root of 22719401 is about 283.2254609731.

The spelling of 22719401 in words is "twenty-two million, seven hundred nineteen thousand, four hundred one".