226551233621 has 4 divisors (see below), whose sum is σ = 228794315244. Its totient is φ = 224308152000.

The previous prime is 226551233617. The next prime is 226551233633. The reversal of 226551233621 is 126332155622.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103564250596 + 122986983025 = 321814^2 + 350695^2 .

It is a cyclic number.

It is not a de Polignac number, because 226551233621 - 2² = 226551233617 is a prime.

It is a super-2 number, since 2×226551233621² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226551233221) 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, 1121540660 + ... + 1121540861.

It is an arithmetic number, because the mean of its divisors is an integer number (57198578811).

Almost surely, 2^226551233621 is an apocalyptic number.

It is an amenable number.

226551233621 is a deficient number, since it is larger than the sum of its proper divisors (2243081623).

226551233621 is a wasteful number, since it uses less digits than its factorization.

226551233621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243081622.

The product of its digits is 129600, while the sum is 38.

The spelling of 226551233621 in words is "two hundred twenty-six billion, five hundred fifty-one million, two hundred thirty-three thousand, six hundred twenty-one".