253305442 has 16 divisors (see below), whose sum is σ = 414368640. Its totient is φ = 115429392.

The previous prime is 253305431. The next prime is 253305443. The reversal of 253305442 is 244503352.

It is a self number, because there is not a number n which added to its sum of digits gives 253305442.

It is not an unprimeable number, because it can be changed into a prime (253305443) 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, 59608 + ... + 63715.

It is an arithmetic number, because the mean of its divisors is an integer number (25898040).

Almost surely, 2^253305442 is an apocalyptic number.

253305442 is a deficient number, since it is larger than the sum of its proper divisors (161063198).

253305442 is a wasteful number, since it uses less digits than its factorization.

253305442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123417.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 253305442 is about 15915.5723114188. The cubic root of 253305442 is about 632.7247750532.

Adding to 253305442 its reverse (244503352), we get a palindrome (497808794).

The spelling of 253305442 in words is "two hundred fifty-three million, three hundred five thousand, four hundred forty-two".