53726621 has 12 divisors (see below), whose sum is σ = 58450932. Its totient is φ = 49360896.

The previous prime is 53726609. The next prime is 53726653. The reversal of 53726621 is 12662735.

It can be written as a sum of positive squares in 6 ways, for example, as 290521 + 53436100 = 539^2 + 7310^2 .

It is a de Polignac number, because none of the positive numbers 2^k-53726621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53722621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42815 + ... + 44051.

It is an arithmetic number, because the mean of its divisors is an integer number (4870911).

Almost surely, 2^53726621 is an apocalyptic number.

It is an amenable number.

53726621 is a deficient number, since it is larger than the sum of its proper divisors (4724311).

53726621 is a wasteful number, since it uses less digits than its factorization.

53726621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1507 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 53726621 is about 7329.8445413256. The cubic root of 53726621 is about 377.3373911885.

The spelling of 53726621 in words is "fifty-three million, seven hundred twenty-six thousand, six hundred twenty-one".