53661724 has 24 divisors (see below), whose sum is σ = 99671040. Its totient is φ = 25191936.

The previous prime is 53661709. The next prime is 53661763. The reversal of 53661724 is 42716635.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 53661724.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41317 + ... + 42595.

It is an arithmetic number, because the mean of its divisors is an integer number (4152960).

Almost surely, 2^53661724 is an apocalyptic number.

It is an amenable number.

53661724 is a deficient number, since it is larger than the sum of its proper divisors (46009316).

53661724 is a wasteful number, since it uses less digits than its factorization.

53661724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 1915 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 53661724 is about 7325.4163021633. The cubic root of 53661724 is about 377.1853999245.

The spelling of 53661724 in words is "fifty-three million, six hundred sixty-one thousand, seven hundred twenty-four".