53310240 has 72 divisors (see below), whose sum is σ = 181926108. Its totient is φ = 14215680.

The previous prime is 53310233. The next prime is 53310247. The reversal of 53310240 is 4201335.

It is an interprime number because it is at equal distance from previous prime (53310233) and next prime (53310247).

It can be written as a sum of positive squares in 2 ways, for example, as 48274704 + 5035536 = 6948^2 + 2244^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (53310247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17071 + ... + 19950.

Almost surely, 2^53310240 is an apocalyptic number.

It is an amenable number.

53310240 is an abundant number, since it is smaller than the sum of its proper divisors (128615868).

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

53310240 is a wasteful number, since it uses less digits than its factorization.

53310240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37042 (or 37031 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 53310240 is about 7301.3861697626. The cubic root of 53310240 is about 376.3600745623.

Adding to 53310240 its reverse (4201335), we get a palindrome (57511575).

The spelling of 53310240 in words is "fifty-three million, three hundred ten thousand, two hundred forty".