53217456 has 20 divisors (see below), whose sum is σ = 137478552. Its totient is φ = 17739136.

The previous prime is 53217449. The next prime is 53217457. The reversal of 53217456 is 65471235.

It is a super-2 number, since 2×53217456² = 5664195246223872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53217457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554301 + ... + 554396.

Almost surely, 2^53217456 is an apocalyptic number.

It is an amenable number.

53217456 is an abundant number, since it is smaller than the sum of its proper divisors (84261096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53217456 is a wasteful number, since it uses less digits than its factorization.

53217456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108708 (or 1108702 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 53217456 is about 7295.0295407215. The cubic root of 53217456 is about 376.1416020152.

The spelling of 53217456 in words is "fifty-three million, two hundred seventeen thousand, four hundred fifty-six".