229189752981 has 48 divisors (see below), whose sum is σ = 386519138304. Its totient is φ = 128137855392.

The previous prime is 229189752971. The next prime is 229189752989. The reversal of 229189752981 is 189257981922.

229189752981 is a `hidden beast` number, since 2 + 2 + 9 + 18 + 97 + 529 + 8 + 1 = 666.

It is not a de Polignac number, because 229189752981 - 2¹⁹ = 229189228693 is a prime.

It is a super-2 number, since 2×229189752981² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229189752989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10776300 + ... + 10797546.

It is an arithmetic number, because the mean of its divisors is an integer number (8052482048).

Almost surely, 2^229189752981 is an apocalyptic number.

229189752981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

229189752981 is a deficient number, since it is larger than the sum of its proper divisors (157329385323).

229189752981 is a wasteful number, since it uses less digits than its factorization.

229189752981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24950 (or 24947 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 63.

The spelling of 229189752981 in words is "two hundred twenty-nine billion, one hundred eighty-nine million, seven hundred fifty-two thousand, nine hundred eighty-one".