2145422140 has 24 divisors (see below), whose sum is σ = 4506575472. Its totient is φ = 857942400.

The previous prime is 2145422131. The next prime is 2145422261. The reversal of 2145422140 is 412245412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78240 + ... + 102040.

It is an arithmetic number, because the mean of its divisors is an integer number (187773978).

Almost surely, 2^2145422140 is an apocalyptic number.

2145422140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145422140 is an abundant number, since it is smaller than the sum of its proper divisors (2361153332).

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

2145422140 is a wasteful number, since it uses less digits than its factorization.

2145422140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28317 (or 28315 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 2145422140 is about 46318.7018384583. The cubic root of 2145422140 is about 1289.7461872699.

Adding to 2145422140 its reverse (412245412), we get a palindrome (2557667552).

The spelling of 2145422140 in words is "two billion, one hundred forty-five million, four hundred twenty-two thousand, one hundred forty".