307078225 has 12 divisors (see below), whose sum is σ = 403176204. Its totient is φ = 231211520.

The previous prime is 307078201. The next prime is 307078243. The reversal of 307078225 is 522870703.

It can be written as a sum of positive squares in 6 ways, for example, as 23357889 + 283720336 = 4833^2 + 16844^2 .

It is not a de Polignac number, because 307078225 - 2⁵ = 307078193 is a prime.

It is a Duffinian number.

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, 360844 + ... + 361693.

It is an arithmetic number, because the mean of its divisors is an integer number (33598017).

Almost surely, 2^307078225 is an apocalyptic number.

It is an amenable number.

307078225 is a deficient number, since it is larger than the sum of its proper divisors (96097979).

307078225 is a wasteful number, since it uses less digits than its factorization.

307078225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722564 (or 722559 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 307078225 is about 17523.6475940370. The cubic root of 307078225 is about 674.6569633289.

The spelling of 307078225 in words is "three hundred seven million, seventy-eight thousand, two hundred twenty-five".