229381551 has 24 divisors (see below), whose sum is σ = 392689024. Its totient is φ = 131074200.

The previous prime is 229381543. The next prime is 229381567. The reversal of 229381551 is 155183922.

229381551 is a `hidden beast` number, since 2 + 29 + 3 + 81 + 551 = 666.

It is not a de Polignac number, because 229381551 - 2³ = 229381543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229381501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65725 + ... + 69126.

Almost surely, 2^229381551 is an apocalyptic number.

229381551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

229381551 is a deficient number, since it is larger than the sum of its proper divisors (163307473).

229381551 is an equidigital number, since it uses as much as digits as its factorization.

229381551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134873 (or 134861 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 229381551 is about 15145.3475034414. The cubic root of 229381551 is about 612.1429164500.

The spelling of 229381551 in words is "two hundred twenty-nine million, three hundred eighty-one thousand, five hundred fifty-one".