19225949 has 2 divisors, whose sum is σ = 19225950. Its totient is φ = 19225948.

The previous prime is 19225931. The next prime is 19225951. The reversal of 19225949 is 94952291.

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., 19201924 + 24025 = 4382^2 + 155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19225949 is a prime.

It is a super-2 number, since 2×19225949² = 739274229901202, which contains 22 as substring.

Together with 19225951, 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 (19225979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9612974 + 9612975.

It is an arithmetic number, because the mean of its divisors is an integer number (9612975).

Almost surely, 2^19225949 is an apocalyptic number.

It is an amenable number.

19225949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19225949 is an equidigital number, since it uses as much as digits as its factorization.

19225949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 19225949 is about 4384.7404712252. The cubic root of 19225949 is about 267.8937584755.

The spelling of 19225949 in words is "nineteen million, two hundred twenty-five thousand, nine hundred forty-nine".