226631187 has 6 divisors (see below), whose sum is σ = 327356172. Its totient is φ = 151087452.

The previous prime is 226631159. The next prime is 226631257. The reversal of 226631187 is 781136622.

226631187 is a `hidden beast` number, since 2 + 2 + 6 + 631 + 18 + 7 = 666.

It is not a de Polignac number, because 226631187 - 2⁶ = 226631123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (226631087) 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, 12590613 + ... + 12590630.

It is an arithmetic number, because the mean of its divisors is an integer number (54559362).

Almost surely, 2^226631187 is an apocalyptic number.

226631187 is a deficient number, since it is larger than the sum of its proper divisors (100724985).

226631187 is a wasteful number, since it uses less digits than its factorization.

226631187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25181249 (or 25181246 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 226631187 is about 15054.2747085338. The cubic root of 226631187 is about 609.6864706088.

The spelling of 226631187 in words is "two hundred twenty-six million, six hundred thirty-one thousand, one hundred eighty-seven".