53356509 has 8 divisors (see below), whose sum is σ = 79046720. Its totient is φ = 35570988.

The previous prime is 53356483. The next prime is 53356529. The reversal of 53356509 is 90565335.

It is not a de Polignac number, because 53356509 - 2⁸ = 53356253 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 (53356529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988057 + ... + 988110.

It is an arithmetic number, because the mean of its divisors is an integer number (9880840).

Almost surely, 2^53356509 is an apocalyptic number.

It is an amenable number.

53356509 is a deficient number, since it is larger than the sum of its proper divisors (25690211).

53356509 is a wasteful number, since it uses less digits than its factorization.

53356509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1976176 (or 1976170 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 36.

The square root of 53356509 is about 7304.5539904911. The cubic root of 53356509 is about 376.4689265001.

The spelling of 53356509 in words is "fifty-three million, three hundred fifty-six thousand, five hundred nine".