2145254404220 has 12 divisors (see below), whose sum is σ = 4505034248904. Its totient is φ = 858101761680.

The previous prime is 2145254404219. The next prime is 2145254404243. The reversal of 2145254404220 is 224044525412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53631360086 + ... + 53631360125.

It is an arithmetic number, because the mean of its divisors is an integer number (375419520742).

Almost surely, 2^{2145254404220} is an apocalyptic number.

2145254404220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145254404220 is an abundant number, since it is smaller than the sum of its proper divisors (2359779844684).

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

2145254404220 is a wasteful number, since it uses less digits than its factorization.

2145254404220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107262720220 (or 107262720218 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 2145254404220 its reverse (224044525412), we get a palindrome (2369298929632).

The spelling of 2145254404220 in words is "two trillion, one hundred forty-five billion, two hundred fifty-four million, four hundred four thousand, two hundred twenty".