53115145 has 4 divisors (see below), whose sum is σ = 63738180. Its totient is φ = 42492112.

The previous prime is 53115137. The next prime is 53115151. The reversal of 53115145 is 54151135.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54151135 = 5 ⋅10830227.

It can be written as a sum of positive squares in 2 ways, for example, as 6370576 + 46744569 = 2524^2 + 6837^2 .

It is a cyclic number.

It is not a de Polignac number, because 53115145 - 2³ = 53115137 is a prime.

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, 5311510 + ... + 5311519.

It is an arithmetic number, because the mean of its divisors is an integer number (15934545).

Almost surely, 2^53115145 is an apocalyptic number.

It is an amenable number.

53115145 is a deficient number, since it is larger than the sum of its proper divisors (10623035).

53115145 is a wasteful number, since it uses less digits than its factorization.

53115145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10623034.

The product of its digits is 1500, while the sum is 25.

The square root of 53115145 is about 7288.0137897784. The cubic root of 53115145 is about 375.9004022643.

The spelling of 53115145 in words is "fifty-three million, one hundred fifteen thousand, one hundred forty-five".