229999531 has 2 divisors, whose sum is σ = 229999532. Its totient is φ = 229999530.

The previous prime is 229999519. The next prime is 229999537. The reversal of 229999531 is 135999922.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 229999531 - 2⁹ = 229999019 is a prime.

It is a super-2 number, since 2×229999531² = 105799568520439922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (229999537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114999765 + 114999766.

It is an arithmetic number, because the mean of its divisors is an integer number (114999766).

Almost surely, 2^229999531 is an apocalyptic number.

229999531 is a deficient number, since it is larger than the sum of its proper divisors (1).

229999531 is an equidigital number, since it uses as much as digits as its factorization.

229999531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 49.

The square root of 229999531 is about 15165.7354256231. The cubic root of 229999531 is about 612.6921510692.

The spelling of 229999531 in words is "two hundred twenty-nine million, nine hundred ninety-nine thousand, five hundred thirty-one".