53770521 has 16 divisors (see below), whose sum is σ = 82089344. Its totient is φ = 30668544.

The previous prime is 53770517. The next prime is 53770537. The reversal of 53770521 is 12507735.

53770521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53770521 - 2² = 53770517 is a prime.

It is a super-2 number, since 2×53770521² = 5782537857222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53770571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10785 + ... + 14961.

It is an arithmetic number, because the mean of its divisors is an integer number (5130584).

Almost surely, 2^53770521 is an apocalyptic number.

It is an amenable number.

53770521 is a deficient number, since it is larger than the sum of its proper divisors (28318823).

53770521 is a wasteful number, since it uses less digits than its factorization.

53770521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 53770521 is about 7332.8385363378. The cubic root of 53770521 is about 377.4401372849.

The spelling of 53770521 in words is "fifty-three million, seven hundred seventy thousand, five hundred twenty-one".