231231124442 has 4 divisors (see below), whose sum is σ = 346846686666. Its totient is φ = 115615562220.

The previous prime is 231231124403. The next prime is 231231124451. The reversal of 231231124442 is 244421132132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199389933961 + 31841190481 = 446531^2 + 178441^2 .

It is a super-2 number, since 2×231231124442² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57807781109 + ... + 57807781112.

Almost surely, 2^231231124442 is an apocalyptic number.

231231124442 is a deficient number, since it is larger than the sum of its proper divisors (115615562224).

231231124442 is a wasteful number, since it uses less digits than its factorization.

231231124442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115615562223.

The product of its digits is 9216, while the sum is 29.

Adding to 231231124442 its reverse (244421132132), we get a palindrome (475652256574).

The spelling of 231231124442 in words is "two hundred thirty-one billion, two hundred thirty-one million, one hundred twenty-four thousand, four hundred forty-two".