19513225 has 12 divisors (see below), whose sum is σ = 24712704. Its totient is φ = 15277520.

The previous prime is 19513211. The next prime is 19513231. The reversal of 19513225 is 52231591.

It is not a de Polignac number, because 19513225 - 2¹³ = 19505033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19513193 and 19513202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7129 + ... + 9478.

It is an arithmetic number, because the mean of its divisors is an integer number (2059392).

Almost surely, 2^19513225 is an apocalyptic number.

It is an amenable number.

19513225 is a deficient number, since it is larger than the sum of its proper divisors (5199479).

19513225 is a wasteful number, since it uses less digits than its factorization.

19513225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16664 (or 16659 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 19513225 is about 4417.3776157354. The cubic root of 19513225 is about 269.2214655602.

The spelling of 19513225 in words is "nineteen million, five hundred thirteen thousand, two hundred twenty-five".