315772189 has 4 divisors (see below), whose sum is σ = 321124320. Its totient is φ = 310420060.

The previous prime is 315772187. The next prime is 315772207. The reversal of 315772189 is 981277513.

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.

It is a cyclic number.

It is not a de Polignac number, because 315772189 - 2¹ = 315772187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315772183) 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, 2675977 + ... + 2676094.

It is an arithmetic number, because the mean of its divisors is an integer number (80281080).

Almost surely, 2^315772189 is an apocalyptic number.

It is an amenable number.

315772189 is a deficient number, since it is larger than the sum of its proper divisors (5352131).

315772189 is an equidigital number, since it uses as much as digits as its factorization.

315772189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352130.

The product of its digits is 105840, while the sum is 43.

The square root of 315772189 is about 17769.9799943613. The cubic root of 315772189 is about 680.9647415086.

The spelling of 315772189 in words is "three hundred fifteen million, seven hundred seventy-two thousand, one hundred eighty-nine".