53542381 has 4 divisors (see below), whose sum is σ = 55388700. Its totient is φ = 51696064.

The previous prime is 53542369. The next prime is 53542393. The reversal of 53542381 is 18324535.

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

It is an interprime number because it is at equal distance from previous prime (53542369) and next prime (53542393).

It can be written as a sum of positive squares in 2 ways, for example, as 11162281 + 42380100 = 3341^2 + 6510^2 .

It is a cyclic number.

It is not a de Polignac number, because 53542381 - 2⁹ = 53541869 is a prime.

It is a super-2 number, since 2×53542381² = 5733573126298322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53542081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923116 + ... + 923173.

It is an arithmetic number, because the mean of its divisors is an integer number (13847175).

Almost surely, 2^53542381 is an apocalyptic number.

It is an amenable number.

53542381 is a deficient number, since it is larger than the sum of its proper divisors (1846319).

53542381 is a wasteful number, since it uses less digits than its factorization.

53542381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846318.

The product of its digits is 14400, while the sum is 31.

The square root of 53542381 is about 7317.2659511596. The cubic root of 53542381 is about 376.9055738484.

The spelling of 53542381 in words is "fifty-three million, five hundred forty-two thousand, three hundred eighty-one".