231642211251 has 32 divisors (see below), whose sum is σ = 354744161280. Its totient is φ = 132971565600.

The previous prime is 231642211219. The next prime is 231642211303. The reversal of 231642211251 is 152112246132.

It is not a de Polignac number, because 231642211251 - 2⁵ = 231642211219 is a prime.

It is a super-3 number, since 3×231642211251³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (231642211351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3054276 + ... + 3129198.

It is an arithmetic number, because the mean of its divisors is an integer number (11085755040).

Almost surely, 2^231642211251 is an apocalyptic number.

231642211251 is a deficient number, since it is larger than the sum of its proper divisors (123101950029).

231642211251 is a wasteful number, since it uses less digits than its factorization.

231642211251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79887.

The product of its digits is 5760, while the sum is 30.

Adding to 231642211251 its reverse (152112246132), we get a palindrome (383754457383).

The spelling of 231642211251 in words is "two hundred thirty-one billion, six hundred forty-two million, two hundred eleven thousand, two hundred fifty-one".