52561578 has 16 divisors (see below), whose sum is σ = 109694016. Its totient is φ = 16758720.

The previous prime is 52561573. The next prime is 52561583. The reversal of 52561578 is 87516525.

It is an interprime number because it is at equal distance from previous prime (52561573) and next prime (52561583).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52561573) 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, 190303 + ... + 190578.

It is an arithmetic number, because the mean of its divisors is an integer number (6855876).

Almost surely, 2^52561578 is an apocalyptic number.

52561578 is an abundant number, since it is smaller than the sum of its proper divisors (57132438).

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

52561578 is a wasteful number, since it uses less digits than its factorization.

52561578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380909.

The product of its digits is 84000, while the sum is 39.

The square root of 52561578 is about 7249.9364135143. The cubic root of 52561578 is about 374.5899589180.

The spelling of 52561578 in words is "fifty-two million, five hundred sixty-one thousand, five hundred seventy-eight".