213231521254 has 16 divisors (see below), whose sum is σ = 339466273056. Its totient is φ = 100105891200.

The previous prime is 213231521213. The next prime is 213231521257. The reversal of 213231521254 is 452125132312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213231521257) 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, 7434042 + ... + 7462669.

It is an arithmetic number, because the mean of its divisors is an integer number (21216642066).

Almost surely, 2^213231521254 is an apocalyptic number.

213231521254 is a deficient number, since it is larger than the sum of its proper divisors (126234751802).

213231521254 is a wasteful number, since it uses less digits than its factorization.

213231521254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14897151.

The product of its digits is 14400, while the sum is 31.

Adding to 213231521254 its reverse (452125132312), we get a palindrome (665356653566).

The spelling of 213231521254 in words is "two hundred thirteen billion, two hundred thirty-one million, five hundred twenty-one thousand, two hundred fifty-four".