53145340 has 24 divisors (see below), whose sum is σ = 111877920. Its totient is φ = 21206208.

The previous prime is 53145331. The next prime is 53145343. The reversal of 53145340 is 4354135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53145343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5754 + ... + 11806.

It is an arithmetic number, because the mean of its divisors is an integer number (4661580).

Almost surely, 2^53145340 is an apocalyptic number.

It is an amenable number.

53145340 is an abundant number, since it is smaller than the sum of its proper divisors (58732580).

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

53145340 is a wasteful number, since it uses less digits than its factorization.

53145340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6501 (or 6499 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 53145340 is about 7290.0850475149. The cubic root of 53145340 is about 375.9716196325.

Adding to 53145340 its reverse (4354135), we get a palindrome (57499475).

The spelling of 53145340 in words is "fifty-three million, one hundred forty-five thousand, three hundred forty".