245686212 has 18 divisors (see below), whose sum is σ = 621040238. Its totient is φ = 81895392.

The previous prime is 245686187. The next prime is 245686213. The reversal of 245686212 is 212686542.

It is a happy number.

245686212 is a `hidden beast` number, since 24 + 5 + 6 + 8 + 621 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 216266436 + 29419776 = 14706^2 + 5424^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6824617 = 245686212 / (2 + 4 + 5 + 6 + 8 + 6 + 2 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (245686213) 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, 3412273 + ... + 3412344.

Almost surely, 2^245686212 is an apocalyptic number.

It is an amenable number.

245686212 is an abundant number, since it is smaller than the sum of its proper divisors (375354026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245686212 is a wasteful number, since it uses less digits than its factorization.

245686212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824627 (or 6824622 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 245686212 is about 15674.3807533185. The cubic root of 245686212 is about 626.3161274549.

The spelling of 245686212 in words is "two hundred forty-five million, six hundred eighty-six thousand, two hundred twelve".