156221043000 has 384 divisors, whose sum is σ = 541179213120. Its totient is φ = 37488000000.

The previous prime is 156221042941. The next prime is 156221043007. The reversal of 156221043000 is 340122651.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156221043007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36660870 + ... + 36665130.

Almost surely, 2^156221043000 is an apocalyptic number.

156221043000 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 156221043000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270589606560).

156221043000 is an abundant number, since it is smaller than the sum of its proper divisors (384958170120).

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

156221043000 is a wasteful number, since it uses less digits than its factorization.

156221043000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408 (or 4383 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 156221043000 its reverse (340122651), we get a palindrome (156561165651).

The spelling of 156221043000 in words is "one hundred fifty-six billion, two hundred twenty-one million, forty-three thousand".