253305645 has 16 divisors (see below), whose sum is σ = 409009920. Its totient is φ = 133856064.

The previous prime is 253305641. The next prime is 253305653. The reversal of 253305645 is 546503352.

253305645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 253305645 - 2² = 253305641 is a prime.

It is a super-3 number, since 3×253305645³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253305641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75829 + ... + 79098.

It is an arithmetic number, because the mean of its divisors is an integer number (25563120).

Almost surely, 2^253305645 is an apocalyptic number.

It is an amenable number.

253305645 is a deficient number, since it is larger than the sum of its proper divisors (155704275).

253305645 is a wasteful number, since it uses less digits than its factorization.

253305645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155044.

The product of its (nonzero) digits is 54000, while the sum is 33.

The square root of 253305645 is about 15915.5786888193. The cubic root of 253305645 is about 632.7249440759.

Adding to 253305645 its reverse (546503352), we get a palindrome (799808997).

The spelling of 253305645 in words is "two hundred fifty-three million, three hundred five thousand, six hundred forty-five".