52621491 has 16 divisors (see below), whose sum is σ = 77404320. Its totient is φ = 31591680.

The previous prime is 52621487. The next prime is 52621523. The reversal of 52621491 is 19412625.

52621491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52621491 - 2² = 52621487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52621441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14856 + ... + 18053.

It is an arithmetic number, because the mean of its divisors is an integer number (4837770).

Almost surely, 2^52621491 is an apocalyptic number.

52621491 is a deficient number, since it is larger than the sum of its proper divisors (24782829).

52621491 is a wasteful number, since it uses less digits than its factorization.

52621491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32966.

The product of its digits is 4320, while the sum is 30.

The square root of 52621491 is about 7254.0672039898. The cubic root of 52621491 is about 374.7322319574.

The spelling of 52621491 in words is "fifty-two million, six hundred twenty-one thousand, four hundred ninety-one".