52515591 has 8 divisors (see below), whose sum is σ = 71510784. Its totient is φ = 34265400.

The previous prime is 52515583. The next prime is 52515613. The reversal of 52515591 is 19551525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52515591 - 2³ = 52515583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52515391) 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 7 ways as a sum of consecutive naturals, for example, 186085 + ... + 186366.

It is an arithmetic number, because the mean of its divisors is an integer number (8938848).

Almost surely, 2^52515591 is an apocalyptic number.

52515591 is a deficient number, since it is larger than the sum of its proper divisors (18995193).

52515591 is a wasteful number, since it uses less digits than its factorization.

52515591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372501.

The product of its digits is 11250, while the sum is 33.

The square root of 52515591 is about 7246.7641744437. The cubic root of 52515591 is about 374.4806820445.

The spelling of 52515591 in words is "fifty-two million, five hundred fifteen thousand, five hundred ninety-one".