2155143435220 has 24 divisors (see below), whose sum is σ = 4526354901600. Its totient is φ = 861951909792.

The previous prime is 2155143435157. The next prime is 2155143435307. The reversal of 2155143435220 is 225343415512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155143435220.

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, 6423850 + ... + 6751009.

It is an arithmetic number, because the mean of its divisors is an integer number (188598120900).

Almost surely, 2^{2155143435220} is an apocalyptic number.

2155143435220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155143435220 is an abundant number, since it is smaller than the sum of its proper divisors (2371211466380).

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

2155143435220 is a wasteful number, since it uses less digits than its factorization.

2155143435220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13183047 (or 13183045 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 2155143435220 in words is "two trillion, one hundred fifty-five billion, one hundred forty-three million, four hundred thirty-five thousand, two hundred twenty".