52218270 has 224 divisors, whose sum is σ = 165261600. Its totient is φ = 11757312.

The previous prime is 52218263. The next prime is 52218277. The reversal of 52218270 is 7281225.

It is an interprime number because it is at equal distance from previous prime (52218263) and next prime (52218277).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52218277) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1800616 + ... + 1800644.

It is an arithmetic number, because the mean of its divisors is an integer number (737775).

Almost surely, 2^52218270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52218270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82630800).

52218270 is an abundant number, since it is smaller than the sum of its proper divisors (113043330).

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

52218270 is a wasteful number, since it uses less digits than its factorization.

52218270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 52218270 is about 7226.2210040934. The cubic root of 52218270 is about 373.7726271988.

Adding to 52218270 its reverse (7281225), we get a palindrome (59499495).

The spelling of 52218270 in words is "fifty-two million, two hundred eighteen thousand, two hundred seventy".