22400250 has 32 divisors (see below), whose sum is σ = 55912896. Its totient is φ = 5973200.

The previous prime is 22400249. The next prime is 22400251. The reversal of 22400250 is 5200422.

It is an interprime number because it is at equal distance from previous prime (22400249) and next prime (22400251).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22400251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14184 + ... + 15683.

It is an arithmetic number, because the mean of its divisors is an integer number (1747278).

Almost surely, 2^22400250 is an apocalyptic number.

22400250 is an abundant number, since it is smaller than the sum of its proper divisors (33512646).

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

22400250 is a wasteful number, since it uses less digits than its factorization.

22400250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29887 (or 29877 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 22400250 is about 4732.8902374765. The cubic root of 22400250 is about 281.8929979839.

Adding to 22400250 its reverse (5200422), we get a palindrome (27600672).

The spelling of 22400250 in words is "twenty-two million, four hundred thousand, two hundred fifty".