52815869 has 2 divisors, whose sum is σ = 52815870. Its totient is φ = 52815868.

The previous prime is 52815857. The next prime is 52815901. The reversal of 52815869 is 96851825.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33120025 + 19695844 = 5755^2 + 4438^2 .

It is a cyclic number.

It is not a de Polignac number, because 52815869 - 2⁴ = 52815853 is a prime.

It is a super-2 number, since 2×52815869² = 5579032036450322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52815809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26407934 + 26407935.

It is an arithmetic number, because the mean of its divisors is an integer number (26407935).

Almost surely, 2^52815869 is an apocalyptic number.

It is an amenable number.

52815869 is a deficient number, since it is larger than the sum of its proper divisors (1).

52815869 is an equidigital number, since it uses as much as digits as its factorization.

52815869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 44.

The square root of 52815869 is about 7267.4527174244. The cubic root of 52815869 is about 375.1930715416.

The spelling of 52815869 in words is "fifty-two million, eight hundred fifteen thousand, eight hundred sixty-nine".