53397557 has 4 divisors (see below), whose sum is σ = 53480736. Its totient is φ = 53314380.

The previous prime is 53397551. The next prime is 53397571. The reversal of 53397557 is 75579335.

53397557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53397557 - 2⁴ = 53397541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53397551) 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 3 ways as a sum of consecutive naturals, for example, 40619 + ... + 41912.

It is an arithmetic number, because the mean of its divisors is an integer number (13370184).

Almost surely, 2^53397557 is an apocalyptic number.

It is an amenable number.

53397557 is a deficient number, since it is larger than the sum of its proper divisors (83179).

53397557 is an equidigital number, since it uses as much as digits as its factorization.

53397557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83178.

The product of its digits is 496125, while the sum is 44.

The square root of 53397557 is about 7307.3632043303. The cubic root of 53397557 is about 376.5654429056.

The spelling of 53397557 in words is "fifty-three million, three hundred ninety-seven thousand, five hundred fifty-seven".