231132221330 has 8 divisors (see below), whose sum is σ = 416037998412. Its totient is φ = 92452888528.

The previous prime is 231132221311. The next prime is 231132221363. The reversal of 231132221330 is 33122231132.

It can be written as a sum of positive squares in 2 ways, for example, as 230537300449 + 594920881 = 480143^2 + 24391^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 231132221296 and 231132221305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11556611057 + ... + 11556611076.

Almost surely, 2^231132221330 is an apocalyptic number.

231132221330 is a deficient number, since it is larger than the sum of its proper divisors (184905777082).

231132221330 is a wasteful number, since it uses less digits than its factorization.

231132221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23113222140.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231132221330 its reverse (33122231132), we get a palindrome (264254452462).

The spelling of 231132221330 in words is "two hundred thirty-one billion, one hundred thirty-two million, two hundred twenty-one thousand, three hundred thirty".