70218225 has 144 divisors (see below), whose sum is σ = 164543040. Its totient is φ = 29030400.

The previous prime is 70218223. The next prime is 70218229. The reversal of 70218225 is 52281207.

70218225 = 25³ + 26³ + ... + 129³.

It is not a de Polignac number, because 70218225 - 2¹ = 70218223 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (70218223) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 363729 + ... + 363921.

It is an arithmetic number, because the mean of its divisors is an integer number (1142660).

Almost surely, 2^70218225 is an apocalyptic number.

70218225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70218225 is an abundant number, since it is smaller than the sum of its proper divisors (94324815).

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

70218225 is a wasteful number, since it uses less digits than its factorization.

70218225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 219 counting only the distinct ones).

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

The square root of 70218225 is about 8379.6315551461. The cubic root of 70218225 is about 412.5563559366.

It can be divided in two parts, 702182 and 25, that added together give a palindrome (702207).

The spelling of 70218225 in words is "seventy million, two hundred eighteen thousand, two hundred twenty-five".