229917931 has 4 divisors (see below), whose sum is σ = 229957000. Its totient is φ = 229878864.

The previous prime is 229917923. The next prime is 229917977. The reversal of 229917931 is 139719922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 139719922 = 2 ⋅69859961.

It is a cyclic number.

It is not a de Polignac number, because 229917931 - 2³ = 229917923 is a prime.

It is a super-2 number, since 2×229917931² = 105724509990641522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (229917901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8706 + ... + 23143.

It is an arithmetic number, because the mean of its divisors is an integer number (57489250).

Almost surely, 2^229917931 is an apocalyptic number.

229917931 is a deficient number, since it is larger than the sum of its proper divisors (39069).

229917931 is an equidigital number, since it uses as much as digits as its factorization.

229917931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39068.

The product of its digits is 61236, while the sum is 43.

The square root of 229917931 is about 15163.0449118902. The cubic root of 229917931 is about 612.6196848443.

The spelling of 229917931 in words is "two hundred twenty-nine million, nine hundred seventeen thousand, nine hundred thirty-one".