22401550 has 12 divisors (see below), whose sum is σ = 41666976. Its totient is φ = 8960600.

The previous prime is 22401541. The next prime is 22401559. The reversal of 22401550 is 5510422.

It is an interprime number because it is at equal distance from previous prime (22401541) and next prime (22401559).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22401559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 223966 + ... + 224065.

It is an arithmetic number, because the mean of its divisors is an integer number (3472248).

Almost surely, 2^22401550 is an apocalyptic number.

22401550 is a deficient number, since it is larger than the sum of its proper divisors (19265426).

22401550 is a wasteful number, since it uses less digits than its factorization.

22401550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448043 (or 448038 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 22401550 is about 4733.0275722839. The cubic root of 22401550 is about 281.8984511047.

Adding to 22401550 its reverse (5510422), we get a palindrome (27911972).

The spelling of 22401550 in words is "twenty-two million, four hundred one thousand, five hundred fifty".