213502544397 has 24 divisors (see below), whose sum is σ = 312656830200. Its totient is φ = 140367403008.

The previous prime is 213502544363. The next prime is 213502544401. The reversal of 213502544397 is 793445205312.

It is a happy number.

213502544397 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 0 + 254 + 4 + 397 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61699579236 + 151802965161 = 248394^2 + 389619^2 .

It is not a de Polignac number, because 213502544397 - 2²⁰ = 213501495821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213502544347) 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, 6941629 + ... + 6972317.

It is an arithmetic number, because the mean of its divisors is an integer number (13027367925).

Almost surely, 2^213502544397 is an apocalyptic number.

It is an amenable number.

213502544397 is a deficient number, since it is larger than the sum of its proper divisors (99154285803).

213502544397 is a wasteful number, since it uses less digits than its factorization.

213502544397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41357 (or 41354 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 213502544397 in words is "two hundred thirteen billion, five hundred two million, five hundred forty-four thousand, three hundred ninety-seven".