156222000 has 320 divisors, whose sum is σ = 612817920. Its totient is φ = 37728000.

The previous prime is 156221999. The next prime is 156222023. The reversal of 156222000 is 222651.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 593869 + ... + 594131.

It is an arithmetic number, because the mean of its divisors is an integer number (1915056).

Almost surely, 2^156222000 is an apocalyptic number.

156222000 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 156222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306408960).

156222000 is an abundant number, since it is smaller than the sum of its proper divisors (456595920).

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

156222000 is a wasteful number, since it uses less digits than its factorization.

156222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 156222000 is about 12498.8799498195. The cubic root of 156222000 is about 538.5764976946.

Adding to 156222000 its reverse (222651), we get a palindrome (156444651).

The spelling of 156222000 in words is "one hundred fifty-six million, two hundred twenty-two thousand".