53721544 has 8 divisors (see below), whose sum is σ = 100727910. Its totient is φ = 26860768.

The previous prime is 53721539. The next prime is 53721553. The reversal of 53721544 is 44512735.

It can be written as a sum of positive squares in only one way, i.e., 33200644 + 20520900 = 5762^2 + 4530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3357589 + ... + 3357604.

Almost surely, 2^53721544 is an apocalyptic number.

It is an amenable number.

53721544 is a deficient number, since it is larger than the sum of its proper divisors (47006366).

53721544 is a wasteful number, since it uses less digits than its factorization.

53721544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715199 (or 6715195 counting only the distinct ones).

The product of its digits is 16800, while the sum is 31.

The square root of 53721544 is about 7329.4982092910. The cubic root of 53721544 is about 377.3255050741.

The spelling of 53721544 in words is "fifty-three million, seven hundred twenty-one thousand, five hundred forty-four".