53445015 has 40 divisors (see below), whose sum is σ = 103184928. Its totient is φ = 26308800.

The previous prime is 53445013. The next prime is 53445053. The reversal of 53445015 is 51054435.

It is not a de Polignac number, because 53445015 - 2¹ = 53445013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 53445015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53445011) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 190 + ... + 10340.

Almost surely, 2^53445015 is an apocalyptic number.

53445015 is a deficient number, since it is larger than the sum of its proper divisors (49739913).

53445015 is a wasteful number, since it uses less digits than its factorization.

53445015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10181 (or 10172 counting only the distinct ones).

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

The square root of 53445015 is about 7310.6097556907. The cubic root of 53445015 is about 376.6769695496.

The spelling of 53445015 in words is "fifty-three million, four hundred forty-five thousand, fifteen".