70321225 has 12 divisors (see below), whose sum is σ = 93906316. Its totient is φ = 51929280.

The previous prime is 70321219. The next prime is 70321243. The reversal of 70321225 is 52212307.

It can be written as a sum of positive squares in 6 ways, for example, as 24880144 + 45441081 = 4988^2 + 6741^2 .

It is not a de Polignac number, because 70321225 - 2²¹ = 68224073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70321196 and 70321205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107862 + ... + 108511.

Almost surely, 2^70321225 is an apocalyptic number.

It is an amenable number.

70321225 is a deficient number, since it is larger than the sum of its proper divisors (23585091).

70321225 is a wasteful number, since it uses less digits than its factorization.

70321225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216396 (or 216391 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 70321225 is about 8385.7751579684. The cubic root of 70321225 is about 412.7579775925.

The spelling of 70321225 in words is "seventy million, three hundred twenty-one thousand, two hundred twenty-five".