235218031 has 2 divisors, whose sum is σ = 235218032. Its totient is φ = 235218030.

The previous prime is 235218029. The next prime is 235218091. The reversal of 235218031 is 130812532.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 235218031 - 2¹ = 235218029 is a prime.

It is a super-2 number, since 2×235218031² = 110655044215033922, which contains 22 as substring.

Together with 235218029, it forms a pair of twin primes.

It is equal to p_12913315 and since 235218031 and 12913315 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 235217987 and 235218005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235218091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117609015 + 117609016.

It is an arithmetic number, because the mean of its divisors is an integer number (117609016).

Almost surely, 2^235218031 is an apocalyptic number.

235218031 is a deficient number, since it is larger than the sum of its proper divisors (1).

235218031 is an equidigital number, since it uses as much as digits as its factorization.

235218031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 235218031 is about 15336.8194551543. The cubic root of 235218031 is about 617.2913671745.

The spelling of 235218031 in words is "two hundred thirty-five million, two hundred eighteen thousand, thirty-one".