52158197 has 24 divisors (see below), whose sum is σ = 67137336. Its totient is φ = 40134528.

The previous prime is 52158167. The next prime is 52158251. The reversal of 52158197 is 79185125.

It can be written as a sum of positive squares in 4 ways, for example, as 25542916 + 26615281 = 5054^2 + 5159^2 .

It is not a de Polignac number, because 52158197 - 2⁶ = 52158133 is a prime.

It is a super-3 number, since 3×52158197³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52158197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52158107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22463 + ... + 24675.

It is an arithmetic number, because the mean of its divisors is an integer number (2797389).

Almost surely, 2^52158197 is an apocalyptic number.

It is an amenable number.

52158197 is a deficient number, since it is larger than the sum of its proper divisors (14979139).

52158197 is a wasteful number, since it uses less digits than its factorization.

52158197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277 (or 2270 counting only the distinct ones).

The product of its digits is 25200, while the sum is 38.

The square root of 52158197 is about 7222.0632093606. The cubic root of 52158197 is about 373.6292402263.

The spelling of 52158197 in words is "fifty-two million, one hundred fifty-eight thousand, one hundred ninety-seven".