2231540777 has 4 divisors (see below), whose sum is σ = 2279020416. Its totient is φ = 2184061140.

The previous prime is 2231540767. The next prime is 2231540789. The reversal of 2231540777 is 7770451322.

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 2231540777 - 2⁴ = 2231540761 is a prime.

It is a super-3 number, since 3×2231540777³ (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 2231540777.

It is not an unprimeable number, because it can be changed into a prime (2231540767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23739749 + ... + 23739842.

It is an arithmetic number, because the mean of its divisors is an integer number (569755104).

Almost surely, 2^2231540777 is an apocalyptic number.

It is an amenable number.

2231540777 is a deficient number, since it is larger than the sum of its proper divisors (47479639).

2231540777 is an equidigital number, since it uses as much as digits as its factorization.

2231540777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47479638.

The product of its (nonzero) digits is 82320, while the sum is 38.

The square root of 2231540777 is about 47239.1868791155. The cubic root of 2231540777 is about 1306.7773821208. Note that the first 3 decimals are identical.

The spelling of 2231540777 in words is "two billion, two hundred thirty-one million, five hundred forty thousand, seven hundred seventy-seven".