15212171158450 has 48 divisors (see below), whose sum is σ = 32345064497664. Its totient is φ = 5214257193600.

The previous prime is 15212171158423. The next prime is 15212171158493. The reversal of 15212171158450 is 5485117121251.

It is a junction number, because it is equal to n+sod(n) for n = 15212171158397 and 15212171158406.

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, 4241154 + ... + 6957853.

It is an arithmetic number, because the mean of its divisors is an integer number (673855510368).

Almost surely, 2^{15212171158450} is an apocalyptic number.

15212171158450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15212171158450 is an abundant number, since it is smaller than the sum of its proper divisors (17132893339214).

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

15212171158450 is a wasteful number, since it uses less digits than its factorization.

15212171158450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11202907 (or 11202902 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 43.

The spelling of 15212171158450 in words is "fifteen trillion, two hundred twelve billion, one hundred seventy-one million, one hundred fifty-eight thousand, four hundred fifty".