52557481 has 4 divisors (see below), whose sum is σ = 53779792. Its totient is φ = 51335172.

The previous prime is 52557473. The next prime is 52557487. The reversal of 52557481 is 18475525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52557481 - 2³ = 52557473 is a prime.

It is a super-2 number, since 2×52557481² = 5524577618130722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52557481.

It is not an unprimeable number, because it can be changed into a prime (52557487) 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, 611091 + ... + 611176.

It is an arithmetic number, because the mean of its divisors is an integer number (13444948).

Almost surely, 2^52557481 is an apocalyptic number.

It is an amenable number.

52557481 is a deficient number, since it is larger than the sum of its proper divisors (1222311).

52557481 is a wasteful number, since it uses less digits than its factorization.

52557481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222310.

The product of its digits is 56000, while the sum is 37.

The square root of 52557481 is about 7249.6538538057. The cubic root of 52557481 is about 374.5802259851.

The spelling of 52557481 in words is "fifty-two million, five hundred fifty-seven thousand, four hundred eighty-one".