226787138 has 4 divisors (see below), whose sum is σ = 340180710. Its totient is φ = 113393568.

The previous prime is 226787137. The next prime is 226787177. The reversal of 226787138 is 831787622.

It is a happy number.

226787138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831787622 = 2 ⋅415893811.

It can be written as a sum of positive squares in only one way, i.e., 218359729 + 8427409 = 14777^2 + 2903^2 .

It is not an unprimeable number, because it can be changed into a prime (226787131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56696783 + ... + 56696786.

Almost surely, 2^226787138 is an apocalyptic number.

226787138 is a deficient number, since it is larger than the sum of its proper divisors (113393572).

226787138 is a wasteful number, since it uses less digits than its factorization.

226787138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113393571.

The product of its digits is 225792, while the sum is 44.

The square root of 226787138 is about 15059.4534429374. The cubic root of 226787138 is about 609.8262857493.

The spelling of 226787138 in words is "two hundred twenty-six million, seven hundred eighty-seven thousand, one hundred thirty-eight".