197215487539 has 8 divisors (see below), whose sum is σ = 225419848448. Its totient is φ = 169018806600.

The previous prime is 197215487471. The next prime is 197215487543. The reversal of 197215487539 is 935784512791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197215487539 - 2¹¹ = 197215485491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197215487569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1864857 + ... + 1967770.

It is an arithmetic number, because the mean of its divisors is an integer number (28177481056).

Almost surely, 2^197215487539 is an apocalyptic number.

197215487539 is a deficient number, since it is larger than the sum of its proper divisors (28204360909).

197215487539 is an equidigital number, since it uses as much as digits as its factorization.

197215487539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839985.

The product of its digits is 19051200, while the sum is 61.

The spelling of 197215487539 in words is "one hundred ninety-seven billion, two hundred fifteen million, four hundred eighty-seven thousand, five hundred thirty-nine".