319448561 has 4 divisors (see below), whose sum is σ = 321964032. Its totient is φ = 316933092.

The previous prime is 319448551. The next prime is 319448573. The reversal of 319448561 is 165844913.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165844913 = 13 ⋅12757301.

It is a cyclic number.

It is not a de Polignac number, because 319448561 - 2²² = 315254257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (319448551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257545 + ... + 1257798.

It is an arithmetic number, because the mean of its divisors is an integer number (80491008).

Almost surely, 2^319448561 is an apocalyptic number.

It is an amenable number.

319448561 is a deficient number, since it is larger than the sum of its proper divisors (2515471).

319448561 is a wasteful number, since it uses less digits than its factorization.

319448561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515470.

The product of its digits is 103680, while the sum is 41.

The square root of 319448561 is about 17873.1239854705. The cubic root of 319448561 is about 683.5972580086.

The spelling of 319448561 in words is "three hundred nineteen million, four hundred forty-eight thousand, five hundred sixty-one".