53955591 has 4 divisors (see below), whose sum is σ = 71940792. Its totient is φ = 35970392.

The previous prime is 53955589. The next prime is 53955607. The reversal of 53955591 is 19555935.

53955591 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.

It is a cyclic number.

It is not a de Polignac number, because 53955591 - 2¹ = 53955589 is a prime.

It is a super-2 number, since 2×53955591² = 5822411600318562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53955521) 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, 8992596 + ... + 8992601.

It is an arithmetic number, because the mean of its divisors is an integer number (17985198).

Almost surely, 2^53955591 is an apocalyptic number.

53955591 is a deficient number, since it is larger than the sum of its proper divisors (17985201).

53955591 is a wasteful number, since it uses less digits than its factorization.

53955591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17985200.

The product of its digits is 151875, while the sum is 42.

The square root of 53955591 is about 7345.4469571293. The cubic root of 53955591 is about 377.8726720444.

The spelling of 53955591 in words is "fifty-three million, nine hundred fifty-five thousand, five hundred ninety-one".