231402215 has 48 divisors (see below), whose sum is σ = 327499200. Its totient is φ = 156288000.

The previous prime is 231402209. The next prime is 231402217. The reversal of 231402215 is 512204132.

It is not a de Polignac number, because 231402215 - 2⁶ = 231402151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231402217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1532390 + ... + 1532540.

It is an arithmetic number, because the mean of its divisors is an integer number (6822900).

Almost surely, 2^231402215 is an apocalyptic number.

231402215 is a deficient number, since it is larger than the sum of its proper divisors (96096985).

231402215 is a wasteful number, since it uses less digits than its factorization.

231402215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 231402215 is about 15211.9103008136. The cubic root of 231402215 is about 613.9351569206.

Adding to 231402215 its reverse (512204132), we get a palindrome (743606347).

The spelling of 231402215 in words is "two hundred thirty-one million, four hundred two thousand, two hundred fifteen".