253303540 has 72 divisors (see below), whose sum is σ = 633280032. Its totient is φ = 84813120.

The previous prime is 253303499. The next prime is 253303559. The reversal of 253303540 is 45303352.

It is a happy number.

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, 39135 + ... + 45145.

It is an arithmetic number, because the mean of its divisors is an integer number (8795556).

Almost surely, 2^253303540 is an apocalyptic number.

253303540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253303540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316640016).

253303540 is an abundant number, since it is smaller than the sum of its proper divisors (379976492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253303540 is a wasteful number, since it uses less digits than its factorization.

253303540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6077 (or 6068 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 253303540 is about 15915.5125585072. The cubic root of 253303540 is about 632.7231913979.

Adding to 253303540 its reverse (45303352), we get a palindrome (298606892).

The spelling of 253303540 in words is "two hundred fifty-three million, three hundred three thousand, five hundred forty".