235530981 has 12 divisors (see below), whose sum is σ = 388813152. Its totient is φ = 134589096.

The previous prime is 235530979. The next prime is 235531003. The reversal of 235530981 is 189035532.

235530981 is a `hidden beast` number, since 2 + 35 + 530 + 98 + 1 = 666.

It is not a de Polignac number, because 235530981 - 2¹ = 235530979 is a prime.

It is a super-2 number, since 2×235530981² = 110949686021644722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235530941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1869231 + ... + 1869356.

It is an arithmetic number, because the mean of its divisors is an integer number (32401096).

Almost surely, 2^235530981 is an apocalyptic number.

235530981 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

235530981 is a deficient number, since it is larger than the sum of its proper divisors (153282171).

235530981 is a wasteful number, since it uses less digits than its factorization.

235530981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738600 (or 3738597 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 235530981 is about 15347.0186355526. The cubic root of 235530981 is about 617.5650079352.

The spelling of 235530981 in words is "two hundred thirty-five million, five hundred thirty thousand, nine hundred eighty-one".