308402225 has 6 divisors (see below), whose sum is σ = 382418790. Its totient is φ = 246721760.

The previous prime is 308402221. The next prime is 308402261. The reversal of 308402225 is 522204803.

It can be written as a sum of positive squares in 3 ways, for example, as 5607424 + 302794801 = 2368^2 + 17401^2 .

It is not a de Polignac number, because 308402225 - 2² = 308402221 is a prime.

It is a super-2 number, since 2×308402225² = 190223864769901250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 308402194 and 308402203.

It is not an unprimeable number, because it can be changed into a prime (308402221) 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, 6168020 + ... + 6168069.

It is an arithmetic number, because the mean of its divisors is an integer number (63736465).

Almost surely, 2^308402225 is an apocalyptic number.

It is an amenable number.

308402225 is a deficient number, since it is larger than the sum of its proper divisors (74016565).

308402225 is a wasteful number, since it uses less digits than its factorization.

308402225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12336099 (or 12336094 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 308402225 is about 17561.3844841459. The cubic root of 308402225 is about 675.6251912252.

The spelling of 308402225 in words is "three hundred eight million, four hundred two thousand, two hundred twenty-five".