2261506563 has 12 divisors (see below), whose sum is σ = 3354908128. Its totient is φ = 1466922960.

The previous prime is 2261506547. The next prime is 2261506573. The reversal of 2261506563 is 3656051622.

It is a happy number.

It is not a de Polignac number, because 2261506563 - 2⁴ = 2261506547 is a prime.

It is a super-2 number, since 2×2261506563² = 10228823868984145938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261506523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3395323 + ... + 3395988.

Almost surely, 2^2261506563 is an apocalyptic number.

2261506563 is a deficient number, since it is larger than the sum of its proper divisors (1093401565).

2261506563 is a wasteful number, since it uses less digits than its factorization.

2261506563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6791354 (or 6791351 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 2261506563 is about 47555.3000516241. The cubic root of 2261506563 is about 1312.6006575319.

The spelling of 2261506563 in words is "two billion, two hundred sixty-one million, five hundred six thousand, five hundred sixty-three".