78335225 has 12 divisors (see below), whose sum is σ = 97253820. Its totient is φ = 62592000.

The previous prime is 78335209. The next prime is 78335273. The reversal of 78335225 is 52253387.

It can be written as a sum of positive squares in 6 ways, for example, as 19598329 + 58736896 = 4427^2 + 7664^2 .

It is not a de Polignac number, because 78335225 - 2⁴ = 78335209 is a prime.

It is a super-2 number, since 2×78335225² = 12272814951601250, which contains 22 as substring.

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, 28721 + ... + 31329.

It is an arithmetic number, because the mean of its divisors is an integer number (8104485).

Almost surely, 2^78335225 is an apocalyptic number.

It is an amenable number.

78335225 is a deficient number, since it is larger than the sum of its proper divisors (18918595).

78335225 is a wasteful number, since it uses less digits than its factorization.

78335225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3820 (or 3815 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 78335225 is about 8850.7188973552. The cubic root of 78335225 is about 427.8770882539.

The spelling of 78335225 in words is "seventy-eight million, three hundred thirty-five thousand, two hundred twenty-five".