53145405 has 24 divisors (see below), whose sum is σ = 93498912. Its totient is φ = 27919584.

The previous prime is 53145397. The next prime is 53145409. The reversal of 53145405 is 50454135.

It is not a de Polignac number, because 53145405 - 2³ = 53145397 is a prime.

It is a super-2 number, since 2×53145405² = 5648868145228050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53145409) 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 23 ways as a sum of consecutive naturals, for example, 5799 + ... + 11828.

It is an arithmetic number, because the mean of its divisors is an integer number (3895788).

Almost surely, 2^53145405 is an apocalyptic number.

It is an amenable number.

53145405 is a deficient number, since it is larger than the sum of its proper divisors (40353507).

53145405 is a wasteful number, since it uses less digits than its factorization.

53145405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17705 (or 17702 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 53145405 is about 7290.0895056234. The cubic root of 53145405 is about 375.9717729112.

The spelling of 53145405 in words is "fifty-three million, one hundred forty-five thousand, four hundred five".