213172013247 has 24 divisors (see below), whose sum is σ = 305570057856. Its totient is φ = 132143438208.

The previous prime is 213172013167. The next prime is 213172013251. The reversal of 213172013247 is 742310271312.

It is not a de Polignac number, because 213172013247 - 2¹⁵ = 213171980479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213172013447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1409203 + ... + 1553124.

It is an arithmetic number, because the mean of its divisors is an integer number (12732085744).

Almost surely, 2^213172013247 is an apocalyptic number.

213172013247 is a deficient number, since it is larger than the sum of its proper divisors (92398044609).

213172013247 is a wasteful number, since it uses less digits than its factorization.

213172013247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962447 (or 2962430 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

Adding to 213172013247 its reverse (742310271312), we get a palindrome (955482284559).

The spelling of 213172013247 in words is "two hundred thirteen billion, one hundred seventy-two million, thirteen thousand, two hundred forty-seven".