53913505 has 4 divisors (see below), whose sum is σ = 64696212. Its totient is φ = 43130800.

The previous prime is 53913499. The next prime is 53913521. The reversal of 53913505 is 50531935.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50531935 = 5 ⋅10106387.

It can be written as a sum of positive squares in 2 ways, for example, as 15374241 + 38539264 = 3921^2 + 6208^2 .

It is not a de Polignac number, because 53913505 - 2⁹ = 53912993 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5391346 + ... + 5391355.

It is an arithmetic number, because the mean of its divisors is an integer number (16174053).

Almost surely, 2^53913505 is an apocalyptic number.

It is an amenable number.

53913505 is a deficient number, since it is larger than the sum of its proper divisors (10782707).

53913505 is a wasteful number, since it uses less digits than its factorization.

53913505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10782706.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 53913505 is about 7342.5816304621. The cubic root of 53913505 is about 377.7743981019.

The spelling of 53913505 in words is "fifty-three million, nine hundred thirteen thousand, five hundred five".