1572152209 has 4 divisors (see below), whose sum is σ = 1605602304. Its totient is φ = 1538702116.

The previous prime is 1572152191. The next prime is 1572152221. The reversal of 1572152209 is 9022512751.

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 1572152209 - 2⁷ = 1572152081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1572152249) 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, 16724977 + ... + 16725070.

It is an arithmetic number, because the mean of its divisors is an integer number (401400576).

Almost surely, 2^1572152209 is an apocalyptic number.

It is an amenable number.

1572152209 is a deficient number, since it is larger than the sum of its proper divisors (33450095).

1572152209 is an equidigital number, since it uses as much as digits as its factorization.

1572152209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33450094.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1572152209 is about 39650.3746388354. The cubic root of 1572152209 is about 1162.7817229725.

The spelling of 1572152209 in words is "one billion, five hundred seventy-two million, one hundred fifty-two thousand, two hundred nine".