52135969 has 4 divisors (see below), whose sum is σ = 53407620. Its totient is φ = 50864320.

The previous prime is 52135927. The next prime is 52136011. The reversal of 52135969 is 96953125.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (52135927) and next prime (52136011).

It can be written as a sum of positive squares in 2 ways, for example, as 2250000 + 49885969 = 1500^2 + 7063^2 .

It is a cyclic number.

It is not a de Polignac number, because 52135969 - 2⁷ = 52135841 is a prime.

It is a super-2 number, since 2×52135969² = 5436318527137922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52115969) 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, 635764 + ... + 635845.

It is an arithmetic number, because the mean of its divisors is an integer number (13351905).

Almost surely, 2^52135969 is an apocalyptic number.

It is an amenable number.

52135969 is a deficient number, since it is larger than the sum of its proper divisors (1271651).

52135969 is a wasteful number, since it uses less digits than its factorization.

52135969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271650.

The product of its digits is 72900, while the sum is 40.

The square root of 52135969 is about 7220.5241499492. The cubic root of 52135969 is about 373.5761567784.

The spelling of 52135969 in words is "fifty-two million, one hundred thirty-five thousand, nine hundred sixty-nine".