68155225 has 6 divisors (see below), whose sum is σ = 84512510. Its totient is φ = 54524160.

The previous prime is 68155211. The next prime is 68155229. The reversal of 68155225 is 52255186.

It can be written as a sum of positive squares in 3 ways, for example, as 7268416 + 60886809 = 2696^2 + 7803^2 .

It is not a de Polignac number, because 68155225 - 2⁷ = 68155097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68155229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1363080 + ... + 1363129.

Almost surely, 2^68155225 is an apocalyptic number.

It is an amenable number.

68155225 is a deficient number, since it is larger than the sum of its proper divisors (16357285).

68155225 is a wasteful number, since it uses less digits than its factorization.

68155225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726219 (or 2726214 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

The square root of 68155225 is about 8255.6177842727. The cubic root of 68155225 is about 408.4758501095.

The spelling of 68155225 in words is "sixty-eight million, one hundred fifty-five thousand, two hundred twenty-five".