245643915 has 48 divisors (see below), whose sum is σ = 442679328. Its totient is φ = 116160000.

The previous prime is 245643899. The next prime is 245643919. The reversal of 245643915 is 519346542.

245643915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245643915 - 2⁴ = 245643899 is a prime.

It is a super-3 number, since 3×245643915³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (245643919) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72765 + ... + 76065.

It is an arithmetic number, because the mean of its divisors is an integer number (9222486).

Almost surely, 2^245643915 is an apocalyptic number.

245643915 is a deficient number, since it is larger than the sum of its proper divisors (197035413).

245643915 is a wasteful number, since it uses less digits than its factorization.

245643915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372 (or 3361 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 245643915 is about 15673.0314553375. The cubic root of 245643915 is about 626.2801834847.

The spelling of 245643915 in words is "two hundred forty-five million, six hundred forty-three thousand, nine hundred fifteen".