70209225 has 36 divisors (see below), whose sum is σ = 131229696. Its totient is φ = 35814240.

The previous prime is 70209221. The next prime is 70209253. The reversal of 70209225 is 52290207.

It is a happy number.

It is not a de Polignac number, because 70209225 - 2² = 70209221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70209221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1609 + ... + 11958.

Almost surely, 2^70209225 is an apocalyptic number.

70209225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70209225 is a deficient number, since it is larger than the sum of its proper divisors (61020471).

70209225 is a wasteful number, since it uses less digits than its factorization.

70209225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13606 (or 13598 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 70209225 is about 8379.0945214862. The cubic root of 70209225 is about 412.5387291460.

The spelling of 70209225 in words is "seventy million, two hundred nine thousand, two hundred twenty-five".