235085681837431 has 4 divisors (see below), whose sum is σ = 235103009608192. Its totient is φ = 235068354066672.

The previous prime is 235085681837359. The next prime is 235085681837441. The reversal of 235085681837431 is 134738186580532.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-235085681837431 is a prime.

It is a super-2 number, since 2×235085681837431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235085681837441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8663865030 + ... + 8663892163.

It is an arithmetic number, because the mean of its divisors is an integer number (58775752402048).

Almost surely, 2^{235085681837431} is an apocalyptic number.

235085681837431 is a deficient number, since it is larger than the sum of its proper divisors (17327770761).

235085681837431 is a wasteful number, since it uses less digits than its factorization.

235085681837431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17327770760.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 235085681837431 in words is "two hundred thirty-five trillion, eighty-five billion, six hundred eighty-one million, eight hundred thirty-seven thousand, four hundred thirty-one".