2232781561 has 4 divisors (see below), whose sum is σ = 2350296400. Its totient is φ = 2115266724.

The previous prime is 2232781559. The next prime is 2232781591. The reversal of 2232781561 is 1651872322.

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.

It is a cyclic number.

It is not a de Polignac number, because 2232781561 - 2¹ = 2232781559 is a prime.

It is a super-3 number, since 3×2232781561³ (a number of 29 digits) contains 333 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 2232781561.

It is not an unprimeable number, because it can be changed into a prime (2232781501) 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, 58757391 + ... + 58757428.

It is an arithmetic number, because the mean of its divisors is an integer number (587574100).

Almost surely, 2^2232781561 is an apocalyptic number.

It is an amenable number.

2232781561 is a deficient number, since it is larger than the sum of its proper divisors (117514839).

2232781561 is a wasteful number, since it uses less digits than its factorization.

2232781561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117514838.

The product of its digits is 40320, while the sum is 37.

The square root of 2232781561 is about 47252.3180489592. The cubic root of 2232781561 is about 1307.0195358919.

The spelling of 2232781561 in words is "two billion, two hundred thirty-two million, seven hundred eighty-one thousand, five hundred sixty-one".