2311478145 has 12 divisors (see below), whose sum is σ = 4006562196. Its totient is φ = 1232788320.

The previous prime is 2311478119. The next prime is 2311478149. The reversal of 2311478145 is 5418741132.

It can be written as a sum of positive squares in 2 ways, for example, as 922276161 + 1389201984 = 30369^2 + 37272^2 .

It is not a de Polignac number, because 2311478145 - 2¹⁰ = 2311477121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2311478149) 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, 25683046 + ... + 25683135.

It is an arithmetic number, because the mean of its divisors is an integer number (333880183).

Almost surely, 2^2311478145 is an apocalyptic number.

It is an amenable number.

2311478145 is a deficient number, since it is larger than the sum of its proper divisors (1695084051).

2311478145 is a wasteful number, since it uses less digits than its factorization.

2311478145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51366192 (or 51366189 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 2311478145 is about 48077.8342378273. The cubic root of 2311478145 is about 1322.1983083564.

The spelling of 2311478145 in words is "two billion, three hundred eleven million, four hundred seventy-eight thousand, one hundred forty-five".