231253402442 has 16 divisors (see below), whose sum is σ = 349727344200. Its totient is φ = 114679928832.

The previous prime is 231253402441. The next prime is 231253402469. The reversal of 231253402442 is 244204352132.

It can be written as a sum of positive squares in 4 ways, for example, as 187819091161 + 43434311281 = 433381^2 + 208409^2 .

It is a super-2 number, since 2×231253402442² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231253402399 and 231253402408.

It is not an unprimeable number, because it can be changed into a prime (231253402441) 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, 375983 + ... + 777090.

Almost surely, 2^231253402442 is an apocalyptic number.

231253402442 is a deficient number, since it is larger than the sum of its proper divisors (118473941758).

231253402442 is a wasteful number, since it uses less digits than its factorization.

231253402442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153897.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 231253402442 its reverse (244204352132), we get a palindrome (475457754574).

The spelling of 231253402442 in words is "two hundred thirty-one billion, two hundred fifty-three million, four hundred two thousand, four hundred forty-two".