19402225 has 24 divisors (see below), whose sum is σ = 25748352. Its totient is φ = 14467200.

The previous prime is 19402199. The next prime is 19402237. The reversal of 19402225 is 52220491.

It is not a de Polignac number, because 19402225 - 2⁵ = 19402193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19402225.

It is a congruent number.

It is an unprimeable number.

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, 23164 + ... + 23986.

It is an arithmetic number, because the mean of its divisors is an integer number (1072848).

Almost surely, 2^19402225 is an apocalyptic number.

It is an amenable number.

19402225 is a deficient number, since it is larger than the sum of its proper divisors (6346127).

19402225 is a wasteful number, since it uses less digits than its factorization.

19402225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 19402225 is about 4404.7956819812. The cubic root of 19402225 is about 268.7100102749.

The spelling of 19402225 in words is "nineteen million, four hundred two thousand, two hundred twenty-five".