19952245 has 4 divisors (see below), whose sum is σ = 23942700. Its totient is φ = 15961792.

The previous prime is 19952209. The next prime is 19952267. The reversal of 19952245 is 54225991.

19952245 = 3158² + 3159².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54225991 = 101 ⋅536891.

It can be written as a sum of positive squares in 2 ways, for example, as 9972964 + 9979281 = 3158^2 + 3159^2 .

It is a cyclic number.

It is not a de Polignac number, because 19952245 - 2⁹ = 19951733 is a prime.

It is a super-3 number, since 3×19952245³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995220 + ... + 1995229.

It is an arithmetic number, because the mean of its divisors is an integer number (5985675).

Almost surely, 2^19952245 is an apocalyptic number.

19952245 is the 3159-th centered square number.

It is an amenable number.

19952245 is a deficient number, since it is larger than the sum of its proper divisors (3990455).

19952245 is an equidigital number, since it uses as much as digits as its factorization.

19952245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990454.

The product of its digits is 32400, while the sum is 37.

The square root of 19952245 is about 4466.7935927240. The cubic root of 19952245 is about 271.2255444551.

The spelling of 19952245 in words is "nineteen million, nine hundred fifty-two thousand, two hundred forty-five".