53720516 has 6 divisors (see below), whose sum is σ = 94010910. Its totient is φ = 26860256.

The previous prime is 53720509. The next prime is 53720519. The reversal of 53720516 is 61502735.

It can be written as a sum of positive squares in only one way, i.e., 53348416 + 372100 = 7304^2 + 610^2 .

It is not an unprimeable number, because it can be changed into a prime (53720519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6715061 + ... + 6715068.

It is an arithmetic number, because the mean of its divisors is an integer number (15668485).

Almost surely, 2^53720516 is an apocalyptic number.

It is an amenable number.

53720516 is a deficient number, since it is larger than the sum of its proper divisors (40290394).

53720516 is a wasteful number, since it uses less digits than its factorization.

53720516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13430133 (or 13430131 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 53720516 is about 7329.4280813717. The cubic root of 53720516 is about 377.3230982614.

The spelling of 53720516 in words is "fifty-three million, seven hundred twenty thousand, five hundred sixteen".