1597052217 has 4 divisors (see below), whose sum is σ = 2129402960. Its totient is φ = 1064701476.

The previous prime is 1597052209. The next prime is 1597052221. The reversal of 1597052217 is 7122507951.

It is a happy number.

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 not a de Polignac number, because 1597052217 - 2³ = 1597052209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1597052257) 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, 266175367 + ... + 266175372.

It is an arithmetic number, because the mean of its divisors is an integer number (532350740).

Almost surely, 2^1597052217 is an apocalyptic number.

It is an amenable number.

1597052217 is a deficient number, since it is larger than the sum of its proper divisors (532350743).

1597052217 is an equidigital number, since it uses as much as digits as its factorization.

1597052217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532350742.

The product of its (nonzero) digits is 44100, while the sum is 39.

The square root of 1597052217 is about 39963.1357253156. The cubic root of 1597052217 is about 1168.8883729064. Note that the first 3 decimals are identical.

The spelling of 1597052217 in words is "one billion, five hundred ninety-seven million, fifty-two thousand, two hundred seventeen".