131872228 has 24 divisors (see below), whose sum is σ = 238042112. Its totient is φ = 63885024.

The previous prime is 131872199. The next prime is 131872231. The reversal of 131872228 is 822278131.

It is a Cunningham number, because it is equal to 509³-1.

It is a junction number, because it is equal to n+sod(n) for n = 131872193 and 131872202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18826 + ... + 24862.

Almost surely, 2^131872228 is an apocalyptic number.

It is an amenable number.

131872228 is a deficient number, since it is larger than the sum of its proper divisors (106169884).

131872228 is a wasteful number, since it uses less digits than its factorization.

131872228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6211 (or 6209 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 131872228 is about 11483.5633842462. The cubic root of 131872228 is about 508.9999987134. Note that the first 5 decimals are identical.

The spelling of 131872228 in words is "one hundred thirty-one million, eight hundred seventy-two thousand, two hundred twenty-eight".