2155430231100 has 72 divisors (see below), whose sum is σ = 6929309047920. Its totient is φ = 574781394240.

The previous prime is 2155430231057. The next prime is 2155430231113. The reversal of 2155430231100 is 11320345512.

2155430231100 is a `hidden beast` number, since 2 + 1 + 5 + 543 + 0 + 2 + 3 + 110 + 0 = 666.

It is a super-2 number, since 2×2155430231100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 399151047 + ... + 399156446.

Almost surely, 2^{2155430231100} is an apocalyptic number.

2155430231100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155430231100 is an abundant number, since it is smaller than the sum of its proper divisors (4773878816820).

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

2155430231100 is a wasteful number, since it uses less digits than its factorization.

2155430231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798307516 (or 798307503 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 2155430231100 its reverse (11320345512), we get a palindrome (2166750576612).

The spelling of 2155430231100 in words is "two trillion, one hundred fifty-five billion, four hundred thirty million, two hundred thirty-one thousand, one hundred".