221023250 has 64 divisors (see below), whose sum is σ = 481987584. Its totient is φ = 74318400.

The previous prime is 221023247. The next prime is 221023259. The reversal of 221023250 is 52320122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221023259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91559 + ... + 93941.

It is an arithmetic number, because the mean of its divisors is an integer number (7531056).

Almost surely, 2^221023250 is an apocalyptic number.

221023250 is an abundant number, since it is smaller than the sum of its proper divisors (260964334).

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

221023250 is a wasteful number, since it uses less digits than its factorization.

221023250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460 (or 2450 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 221023250 is about 14866.8507088758. The cubic root of 221023250 is about 604.6155606962.

Adding to 221023250 its reverse (52320122), we get a palindrome (273343372).

It can be divided in two parts, 22102 and 3250, that added together give a palindrome (25352).

The spelling of 221023250 in words is "two hundred twenty-one million, twenty-three thousand, two hundred fifty".