253215450442 has 4 divisors (see below), whose sum is σ = 379823175666. Its totient is φ = 126607725220.

The previous prime is 253215450437. The next prime is 253215450457. The reversal of 253215450442 is 244054512352.

253215450442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 185692908241 + 67522542201 = 430921^2 + 259851^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63303862609 + ... + 63303862612.

Almost surely, 2^253215450442 is an apocalyptic number.

253215450442 is a deficient number, since it is larger than the sum of its proper divisors (126607725224).

253215450442 is a wasteful number, since it uses less digits than its factorization.

253215450442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126607725223.

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 253215450442 its reverse (244054512352), we get a palindrome (497269962794).

The spelling of 253215450442 in words is "two hundred fifty-three billion, two hundred fifteen million, four hundred fifty thousand, four hundred forty-two".