42553515 has 16 divisors (see below), whose sum is σ = 69926688. Its totient is φ = 22081536.

The previous prime is 42553513. The next prime is 42553517. The reversal of 42553515 is 51535524.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42553513) and next prime (42553517).

It is not a de Polignac number, because 42553515 - 2¹ = 42553513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42553513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37782 + ... + 38891.

It is an arithmetic number, because the mean of its divisors is an integer number (4370418).

Almost surely, 2^42553515 is an apocalyptic number.

42553515 is a deficient number, since it is larger than the sum of its proper divisors (27373173).

42553515 is a wasteful number, since it uses less digits than its factorization.

42553515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76718.

The product of its digits is 15000, while the sum is 30.

The square root of 42553515 is about 6523.3055271082. The cubic root of 42553515 is about 349.1230152849.

Subtracting 42553515 from its reverse (51535524), we obtain a square (8982009 = 2997²).

The spelling of 42553515 in words is "forty-two million, five hundred fifty-three thousand, five hundred fifteen".