221400150 has 24 divisors (see below), whose sum is σ = 549072744. Its totient is φ = 59040000.

The previous prime is 221400131. The next prime is 221400161. The reversal of 221400150 is 51004122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 737851 + ... + 738150.

It is an arithmetic number, because the mean of its divisors is an integer number (22878031).

Almost surely, 2^221400150 is an apocalyptic number.

221400150 is an abundant number, since it is smaller than the sum of its proper divisors (327672594).

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

221400150 is a wasteful number, since it uses less digits than its factorization.

221400150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476016 (or 1476011 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 221400150 is about 14879.5211616503. The cubic root of 221400150 is about 604.9590391867.

Adding to 221400150 its reverse (51004122), we get a palindrome (272404272).

The spelling of 221400150 in words is "two hundred twenty-one million, four hundred thousand, one hundred fifty".