1214311231 has 8 divisors (see below), whose sum is σ = 1388012544. Its totient is φ = 1040667000.

The previous prime is 1214311213. The next prime is 1214311247. The reversal of 1214311231 is 1321134121.

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 1214311231 - 2¹¹ = 1214309183 is a prime.

It is a super-2 number, since 2×1214311231² = 2949103531465470722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1214311199 and 1214311208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214311211) 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, 51606 + ... + 71356.

It is an arithmetic number, because the mean of its divisors is an integer number (173501568).

Almost surely, 2^1214311231 is an apocalyptic number.

1214311231 is a deficient number, since it is larger than the sum of its proper divisors (173701313).

1214311231 is an equidigital number, since it uses as much as digits as its factorization.

1214311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28541.

The product of its digits is 144, while the sum is 19.

The square root of 1214311231 is about 34846.9687490892. The cubic root of 1214311231 is about 1066.8663171967.

Adding to 1214311231 its reverse (1321134121), we get a palindrome (2535445352).

It can be divided in two parts, 1214 and 311231, that added together give a triangular number (312445 = T₇₉₀).

The spelling of 1214311231 in words is "one billion, two hundred fourteen million, three hundred eleven thousand, two hundred thirty-one".