2312145440 has 72 divisors (see below), whose sum is σ = 6004223820. Its totient is φ = 840773120.

The previous prime is 2312145439. The next prime is 2312145457. The reversal of 2312145440 is 445412132.

It can be written as a sum of positive squares in 2 ways, for example, as 2212385296 + 99760144 = 47036^2 + 9988^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40355 + ... + 79074.

Almost surely, 2^2312145440 is an apocalyptic number.

2312145440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2312145440 is an abundant number, since it is smaller than the sum of its proper divisors (3692078380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2312145440 is a wasteful number, since it uses less digits than its factorization.

2312145440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119466 (or 119447 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 2312145440 is about 48084.7734735228. The cubic root of 2312145440 is about 1322.3255301853.

Adding to 2312145440 its reverse (445412132), we get a palindrome (2757557572).

The spelling of 2312145440 in words is "two billion, three hundred twelve million, one hundred forty-five thousand, four hundred forty".