253340045 has 24 divisors (see below), whose sum is σ = 355013784. Its totient is φ = 173045376.

The previous prime is 253339997. The next prime is 253340057. The reversal of 253340045 is 540043352.

It can be written as a sum of positive squares in 4 ways, for example, as 7038409 + 246301636 = 2653^2 + 15694^2 .

It is a de Polignac number, because none of the positive numbers 2^k-253340045 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253339996 and 253340023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65999 + ... + 69731.

It is an arithmetic number, because the mean of its divisors is an integer number (14792241).

Almost surely, 2^253340045 is an apocalyptic number.

It is an amenable number.

253340045 is a deficient number, since it is larger than the sum of its proper divisors (101673739).

253340045 is a wasteful number, since it uses less digits than its factorization.

253340045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029 (or 4022 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 253340045 is about 15916.6593542741. The cubic root of 253340045 is about 632.7535850390.

Adding to 253340045 its reverse (540043352), we get a palindrome (793383397).

The spelling of 253340045 in words is "two hundred fifty-three million, three hundred forty thousand, forty-five".