2102643245 has 32 divisors (see below), whose sum is σ = 2617401600. Its totient is φ = 1620850176.

The previous prime is 2102643229. The next prime is 2102643247. The reversal of 2102643245 is 5423462012.

It is a cyclic number.

It is not a de Polignac number, because 2102643245 - 2⁴ = 2102643229 is a prime.

It is a super-2 number, since 2×2102643245² = 8842217231488260050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102643247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3249512 + ... + 3250158.

It is an arithmetic number, because the mean of its divisors is an integer number (81793800).

Almost surely, 2^2102643245 is an apocalyptic number.

It is an amenable number.

2102643245 is a deficient number, since it is larger than the sum of its proper divisors (514758355).

2102643245 is a wasteful number, since it uses less digits than its factorization.

2102643245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 2102643245 is about 45854.5880474353. The cubic root of 2102643245 is about 1281.1162229710.

The spelling of 2102643245 in words is "two billion, one hundred two million, six hundred forty-three thousand, two hundred forty-five".