53205566 has 4 divisors (see below), whose sum is σ = 79808352. Its totient is φ = 26602782.

The previous prime is 53205557. The next prime is 53205589. The reversal of 53205566 is 66550235.

It is a semiprime because it is the product of two primes.

It is a super-4 number, since 4×53205566⁴ (a number of 32 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13301390 + ... + 13301393.

It is an arithmetic number, because the mean of its divisors is an integer number (19952088).

Almost surely, 2^53205566 is an apocalyptic number.

53205566 is a deficient number, since it is larger than the sum of its proper divisors (26602786).

53205566 is a wasteful number, since it uses less digits than its factorization.

53205566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26602785.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 53205566 is about 7294.2145567566. The cubic root of 53205566 is about 376.1135870423.

The spelling of 53205566 in words is "fifty-three million, two hundred five thousand, five hundred sixty-six".