2155436221203 has 12 divisors (see below), whose sum is σ = 3116463244440. Its totient is φ = 1435547310336.

The previous prime is 2155436221189. The next prime is 2155436221219. The reversal of 2155436221203 is 3021226345512.

2155436221203 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 4 + 3 + 622 + 1 + 20 + 3 = 666.

It is not a de Polignac number, because 2155436221203 - 2³² = 2151141253907 is a prime.

It is a super-3 number, since 3×2155436221203³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2155436221243) 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, 117504526 + ... + 117522867.

It is an arithmetic number, because the mean of its divisors is an integer number (259705270370).

Almost surely, 2^{2155436221203} is an apocalyptic number.

2155436221203 is a deficient number, since it is larger than the sum of its proper divisors (961027023237).

2155436221203 is a wasteful number, since it uses less digits than its factorization.

2155436221203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235028418 (or 235028415 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 2155436221203 in words is "two trillion, one hundred fifty-five billion, four hundred thirty-six million, two hundred twenty-one thousand, two hundred three".