70812225 has 135 divisors (see below), whose sum is σ = 153157081. Its totient is φ = 32313600.

The previous prime is 70812223. The next prime is 70812251. The reversal of 70812225 is 52221807.

The square root of 70812225 is 8415.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1656369 + 69155856 = 1287^2 + 8316^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 70812225 - 2¹ = 70812223 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 (70812223) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 4165417 + ... + 4165433.

Almost surely, 2^70812225 is an apocalyptic number.

70812225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

70812225 is the 8415-th square number.

70812225 is the 4208-th centered octagonal number.

It is an amenable number.

70812225 is an abundant number, since it is smaller than the sum of its proper divisors (82344856).

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

70812225 is a wasteful number, since it uses less digits than its factorization.

70812225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 36 counting only the distinct ones).

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

The cubic root of 70812225 is about 413.7164094391.

The spelling of 70812225 in words is "seventy million, eight hundred twelve thousand, two hundred twenty-five".