2261561267 has 8 divisors (see below), whose sum is σ = 2600499456. Its totient is φ = 1926587592.

The previous prime is 2261561257. The next prime is 2261561287. The reversal of 2261561267 is 7621651622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2261561267 is a prime.

It is a super-2 number, since 2×2261561267² = 10229318728789290578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261561267.

It is not an unprimeable number, because it can be changed into a prime (2261561257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 989903 + ... + 992184.

It is an arithmetic number, because the mean of its divisors is an integer number (325062432).

Almost surely, 2^2261561267 is an apocalyptic number.

2261561267 is a deficient number, since it is larger than the sum of its proper divisors (338938189).

2261561267 is a wasteful number, since it uses less digits than its factorization.

2261561267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982257.

The product of its digits is 60480, while the sum is 38.

The square root of 2261561267 is about 47555.8752101147. The cubic root of 2261561267 is about 1312.6112410265.

The spelling of 2261561267 in words is "two billion, two hundred sixty-one million, five hundred sixty-one thousand, two hundred sixty-seven".