52787557 has 2 divisors, whose sum is σ = 52787558. Its totient is φ = 52787556.

The previous prime is 52787503. The next prime is 52787621. The reversal of 52787557 is 75578725.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51854401 + 933156 = 7201^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 52787557 - 2⁷ = 52787429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52787957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26393778 + 26393779.

It is an arithmetic number, because the mean of its divisors is an integer number (26393779).

Almost surely, 2^52787557 is an apocalyptic number.

It is an amenable number.

52787557 is a deficient number, since it is larger than the sum of its proper divisors (1).

52787557 is an equidigital number, since it uses as much as digits as its factorization.

52787557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 686000, while the sum is 46.

The square root of 52787557 is about 7265.5045936260. The cubic root of 52787557 is about 375.1260186837.

It can be divided in two parts, 5278 and 7557, that multiplied together give a triangular number (39885846 = T₈₉₃₁).

The spelling of 52787557 in words is "fifty-two million, seven hundred eighty-seven thousand, five hundred fifty-seven".