105215171400 has 384 divisors, whose sum is σ = 382350528000. Its totient is φ = 26520203520.

The previous prime is 105215171363. The next prime is 105215171473. The reversal of 105215171400 is 4171512501.

105215171400 is a `hidden beast` number, since 1 + 0 + 5 + 2 + 1 + 517 + 140 + 0 = 666.

It is a super-2 number, since 2×105215171400² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 60225327 + ... + 60227073.

It is an arithmetic number, because the mean of its divisors is an integer number (995704500).

Almost surely, 2^105215171400 is an apocalyptic number.

105215171400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 105215171400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191175264000).

105215171400 is an abundant number, since it is smaller than the sum of its proper divisors (277135356600).

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

105215171400 is a wasteful number, since it uses less digits than its factorization.

105215171400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 2363 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

Adding to 105215171400 its reverse (4171512501), we get a palindrome (109386683901).

The spelling of 105215171400 in words is "one hundred five billion, two hundred fifteen million, one hundred seventy-one thousand, four hundred".