231401215 has 8 divisors (see below), whose sum is σ = 277812288. Its totient is φ = 185033760.

The previous prime is 231401197. The next prime is 231401221. The reversal of 231401215 is 512104132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231401215 - 2⁷ = 231401087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231401192 and 231401201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2205 + ... + 21625.

It is an arithmetic number, because the mean of its divisors is an integer number (34726536).

Almost surely, 2^231401215 is an apocalyptic number.

231401215 is a deficient number, since it is larger than the sum of its proper divisors (46411073).

231401215 is a wasteful number, since it uses less digits than its factorization.

231401215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21809.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 231401215 is about 15211.8774317965. The cubic root of 231401215 is about 613.9342725499.

Adding to 231401215 its reverse (512104132), we get a palindrome (743505347).

The spelling of 231401215 in words is "two hundred thirty-one million, four hundred one thousand, two hundred fifteen".