53542661 has 4 divisors (see below), whose sum is σ = 53928000. Its totient is φ = 53157324.

The previous prime is 53542651. The next prime is 53542669. The reversal of 53542661 is 16624535.

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 a de Polignac number, because none of the positive numbers 2^k-53542661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53542669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192461 + ... + 192738.

It is an arithmetic number, because the mean of its divisors is an integer number (13482000).

Almost surely, 2^53542661 is an apocalyptic number.

It is an amenable number.

53542661 is a deficient number, since it is larger than the sum of its proper divisors (385339).

53542661 is a wasteful number, since it uses less digits than its factorization.

53542661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385338.

The product of its digits is 21600, while the sum is 32.

The square root of 53542661 is about 7317.2850839639. The cubic root of 53542661 is about 376.9062308568.

The spelling of 53542661 in words is "fifty-three million, five hundred forty-two thousand, six hundred sixty-one".