215054231 has 12 divisors (see below), whose sum is σ = 250523952. Its totient is φ = 180837696.

The previous prime is 215054221. The next prime is 215054237. The reversal of 215054231 is 132450512.

It is a de Polignac number, because none of the positive numbers 2^k-215054231 is a prime.

It is a super-2 number, since 2×215054231² = 92496644542002722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215054197 and 215054206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215054237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14195 + ... + 25131.

It is an arithmetic number, because the mean of its divisors is an integer number (20876996).

Almost surely, 2^215054231 is an apocalyptic number.

215054231 is a deficient number, since it is larger than the sum of its proper divisors (35469721).

215054231 is an equidigital number, since it uses as much as digits as its factorization.

215054231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11050 (or 10997 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 215054231 is about 14664.7274437679. The cubic root of 215054231 is about 599.1230067255.

The spelling of 215054231 in words is "two hundred fifteen million, fifty-four thousand, two hundred thirty-one".