235140631 has 6 divisors (see below), whose sum is σ = 258460496. Its totient is φ = 213764100.

The previous prime is 235140623. The next prime is 235140679. The reversal of 235140631 is 136041532.

It is not a de Polignac number, because 235140631 - 2³ = 235140623 is a prime.

It is a super-2 number, since 2×235140631² = 110582232694156322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 235140596 and 235140605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235140131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 971535 + ... + 971776.

Almost surely, 2^235140631 is an apocalyptic number.

235140631 is a deficient number, since it is larger than the sum of its proper divisors (23319865).

235140631 is a wasteful number, since it uses less digits than its factorization.

235140631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943333 (or 1943322 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 235140631 is about 15334.2959081922. The cubic root of 235140631 is about 617.2236518536.

Subtracting from 235140631 its reverse (136041532), we obtain a palindrome (99099099).

The spelling of 235140631 in words is "two hundred thirty-five million, one hundred forty thousand, six hundred thirty-one".