130231440242 has 4 divisors (see below), whose sum is σ = 195347160366. Its totient is φ = 65115720120.

The previous prime is 130231440239. The next prime is 130231440247. The reversal of 130231440242 is 242044132031.

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., 129492742201 + 738698041 = 359851^2 + 27179^2 .

It is not an unprimeable number, because it can be changed into a prime (130231440247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32557860059 + ... + 32557860062.

Almost surely, 2^130231440242 is an apocalyptic number.

130231440242 is a deficient number, since it is larger than the sum of its proper divisors (65115720124).

130231440242 is an equidigital number, since it uses as much as digits as its factorization.

130231440242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65115720123.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 130231440242 its reverse (242044132031), we get a palindrome (372275572273).

The spelling of 130231440242 in words is "one hundred thirty billion, two hundred thirty-one million, four hundred forty thousand, two hundred forty-two".