52215198 has 64 divisors (see below), whose sum is σ = 125632512. Its totient is φ = 14145120.

The previous prime is 52215193. The next prime is 52215199. The reversal of 52215198 is 89151225.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52215193) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 184365 + ... + 184647.

It is an arithmetic number, because the mean of its divisors is an integer number (1963008).

Almost surely, 2^52215198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52215198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62816256).

52215198 is an abundant number, since it is smaller than the sum of its proper divisors (73417314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52215198 is a wasteful number, since it uses less digits than its factorization.

52215198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its digits is 7200, while the sum is 33.

The square root of 52215198 is about 7226.0084417332. The cubic root of 52215198 is about 373.7652973758.

The spelling of 52215198 in words is "fifty-two million, two hundred fifteen thousand, one hundred ninety-eight".