215235854231 has 2 divisors, whose sum is σ = 215235854232. Its totient is φ = 215235854230.

The previous prime is 215235854219. The next prime is 215235854243. The reversal of 215235854231 is 132458532512.

It is a balanced prime because it is at equal distance from previous prime (215235854219) and next prime (215235854243).

It is a cyclic number.

It is not a de Polignac number, because 215235854231 - 2⁶ = 215235854167 is a prime.

It is a super-2 number, since 2×215235854231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215235854291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107617927115 + 107617927116.

It is an arithmetic number, because the mean of its divisors is an integer number (107617927116).

Almost surely, 2^215235854231 is an apocalyptic number.

215235854231 is a deficient number, since it is larger than the sum of its proper divisors (1).

215235854231 is an equidigital number, since it uses as much as digits as its factorization.

215235854231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288000, while the sum is 41.

The spelling of 215235854231 in words is "two hundred fifteen billion, two hundred thirty-five million, eight hundred fifty-four thousand, two hundred thirty-one".