1775228145 has 32 divisors (see below), whose sum is σ = 3009726720. Its totient is φ = 890419200.

The previous prime is 1775228131. The next prime is 1775228149. The reversal of 1775228145 is 5418225771.

It is not a de Polignac number, because 1775228145 - 2⁴ = 1775228129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1775228097 and 1775228106.

It is not an unprimeable number, because it can be changed into a prime (1775228149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 649141 + ... + 651869.

It is an arithmetic number, because the mean of its divisors is an integer number (94053960).

Almost surely, 2^1775228145 is an apocalyptic number.

1775228145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1775228145 is a deficient number, since it is larger than the sum of its proper divisors (1234498575).

1775228145 is a wasteful number, since it uses less digits than its factorization.

1775228145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305.

The product of its digits is 156800, while the sum is 42.

The square root of 1775228145 is about 42133.4563618984. The cubic root of 1775228145 is about 1210.8343277022.

The spelling of 1775228145 in words is "one billion, seven hundred seventy-five million, two hundred twenty-eight thousand, one hundred forty-five".