245222657 has 4 divisors (see below), whose sum is σ = 245389056. Its totient is φ = 245056260.

The previous prime is 245222651. The next prime is 245222669. The reversal of 245222657 is 756222542.

It is a happy number.

245222657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 756222542 = 2 ⋅378111271.

It is a cyclic number.

It is not a de Polignac number, because 245222657 - 2⁸ = 245222401 is a prime.

It is a super-2 number, since 2×245222657² = 120268303012279298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245222651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80969 + ... + 83942.

It is an arithmetic number, because the mean of its divisors is an integer number (61347264).

Almost surely, 2^245222657 is an apocalyptic number.

It is an amenable number.

245222657 is a deficient number, since it is larger than the sum of its proper divisors (166399).

245222657 is a wasteful number, since it uses less digits than its factorization.

245222657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166398.

The product of its digits is 67200, while the sum is 35.

The square root of 245222657 is about 15659.5867442280. The cubic root of 245222657 is about 625.9219732491.

The spelling of 245222657 in words is "two hundred forty-five million, two hundred twenty-two thousand, six hundred fifty-seven".