253144520242 has 8 divisors (see below), whose sum is σ = 384918380316. Its totient is φ = 124838393472.

The previous prime is 253144520221. The next prime is 253144520249. The reversal of 253144520242 is 242025441352.

It can be written as a sum of positive squares in 2 ways, for example, as 225529060201 + 27615460041 = 474899^2 + 166179^2 .

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 = 253144520198 and 253144520207.

It is not an unprimeable number, because it can be changed into a prime (253144520249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866933143 + ... + 866933434.

Almost surely, 2^253144520242 is an apocalyptic number.

253144520242 is a deficient number, since it is larger than the sum of its proper divisors (131773860074).

253144520242 is a wasteful number, since it uses less digits than its factorization.

253144520242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733866652.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 253144520242 its reverse (242025441352), we get a palindrome (495169961594).

The spelling of 253144520242 in words is "two hundred fifty-three billion, one hundred forty-four million, five hundred twenty thousand, two hundred forty-two".