224400551 has 4 divisors (see below), whose sum is σ = 224606952. Its totient is φ = 224194152.

The previous prime is 224400529. The next prime is 224400563. The reversal of 224400551 is 155004422.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 224400551 - 2¹⁸ = 224138407 is a prime.

It is a super-4 number, since 4×224400551⁴ (a number of 35 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224400751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101561 + ... + 103746.

It is an arithmetic number, because the mean of its divisors is an integer number (56151738).

Almost surely, 2^224400551 is an apocalyptic number.

224400551 is a deficient number, since it is larger than the sum of its proper divisors (206401).

224400551 is a wasteful number, since it uses less digits than its factorization.

224400551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206400.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 224400551 is about 14980.0050400526. The cubic root of 224400551 is about 607.6795754698.

Adding to 224400551 its reverse (155004422), we get a palindrome (379404973).

The spelling of 224400551 in words is "two hundred twenty-four million, four hundred thousand, five hundred fifty-one".