52501555 has 4 divisors (see below), whose sum is σ = 63001872. Its totient is φ = 42001240.

The previous prime is 52501543. The next prime is 52501577. The reversal of 52501555 is 55510525.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-52501555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5250151 + ... + 5250160.

It is an arithmetic number, because the mean of its divisors is an integer number (15750468).

Almost surely, 2^52501555 is an apocalyptic number.

52501555 is a deficient number, since it is larger than the sum of its proper divisors (10500317).

52501555 is a wasteful number, since it uses less digits than its factorization.

52501555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500316.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 52501555 is about 7245.7956774946. The cubic root of 52501555 is about 374.4473162122.

The spelling of 52501555 in words is "fifty-two million, five hundred one thousand, five hundred fifty-five".