22400551 has 8 divisors (see below), whose sum is σ = 23482080. Its totient is φ = 21328032.

The previous prime is 22400533. The next prime is 22400591. The reversal of 22400551 is 15500422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22400551 - 2⁷ = 22400423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3141 + ... + 7393.

It is an arithmetic number, because the mean of its divisors is an integer number (2935260).

Almost surely, 2^22400551 is an apocalyptic number.

22400551 is a deficient number, since it is larger than the sum of its proper divisors (1081529).

22400551 is a wasteful number, since it uses less digits than its factorization.

22400551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505.

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

The square root of 22400551 is about 4732.9220361210. The cubic root of 22400551 is about 281.8942606098.

Adding to 22400551 its reverse (15500422), we get a palindrome (37900973).

The spelling of 22400551 in words is "twenty-two million, four hundred thousand, five hundred fifty-one".