52157069 has 4 divisors (see below), whose sum is σ = 52237596. Its totient is φ = 52076544.

The previous prime is 52157057. The next prime is 52157081. The reversal of 52157069 is 96075125.

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 (52157057) and next prime (52157081).

It can be written as a sum of positive squares in 2 ways, for example, as 8094025 + 44063044 = 2845^2 + 6638^2 .

It is a cyclic number.

It is not a de Polignac number, because 52157069 - 2¹² = 52152973 is a prime.

It is a super-2 number, since 2×52157069² = 5440719693341522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52157029) 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, 39284 + ... + 40589.

It is an arithmetic number, because the mean of its divisors is an integer number (13059399).

Almost surely, 2^52157069 is an apocalyptic number.

It is an amenable number.

52157069 is a deficient number, since it is larger than the sum of its proper divisors (80527).

52157069 is an equidigital number, since it uses as much as digits as its factorization.

52157069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80526.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 52157069 is about 7221.9851149113. The cubic root of 52157069 is about 373.6265467742.

The spelling of 52157069 in words is "fifty-two million, one hundred fifty-seven thousand, sixty-nine".