226891557 has 8 divisors (see below), whose sum is σ = 336135680. Its totient is φ = 151261020.

The previous prime is 226891541. The next prime is 226891579. The reversal of 226891557 is 755198622.

226891557 is a `hidden beast` number, since 2 + 2 + 6 + 8 + 91 + 557 = 666.

It is not a de Polignac number, because 226891557 - 2⁴ = 226891541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226891657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4201669 + ... + 4201722.

It is an arithmetic number, because the mean of its divisors is an integer number (42016960).

Almost surely, 2^226891557 is an apocalyptic number.

226891557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

226891557 is a deficient number, since it is larger than the sum of its proper divisors (109244123).

226891557 is an equidigital number, since it uses as much as digits as its factorization.

226891557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8403400 (or 8403394 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 226891557 is about 15062.9199360549. The cubic root of 226891557 is about 609.9198649547.

The spelling of 226891557 in words is "two hundred twenty-six million, eight hundred ninety-one thousand, five hundred fifty-seven".