215210135231 has 8 divisors (see below), whose sum is σ = 264874012704. Its totient is φ = 170276150880.

The previous prime is 215210135219. The next prime is 215210135381. The reversal of 215210135231 is 132531012512.

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

It is a cyclic number.

It is not a de Polignac number, because 215210135231 - 2²² = 215205940927 is a prime.

It is a super-2 number, since 2×215210135231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 215210135231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215210135201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182473180 + ... + 1182473361.

It is an arithmetic number, because the mean of its divisors is an integer number (33109251588).

Almost surely, 2^215210135231 is an apocalyptic number.

215210135231 is a deficient number, since it is larger than the sum of its proper divisors (49663877473).

215210135231 is a wasteful number, since it uses less digits than its factorization.

215210135231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364946561.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 215210135231 its reverse (132531012512), we get a palindrome (347741147743).

The spelling of 215210135231 in words is "two hundred fifteen billion, two hundred ten million, one hundred thirty-five thousand, two hundred thirty-one".