1214661231 has 32 divisors (see below), whose sum is σ = 2079705600. Its totient is φ = 686283840.

The previous prime is 1214661223. The next prime is 1214661299. The reversal of 1214661231 is 1321664121.

It is a happy number.

1214661231 is a `hidden beast` number, since 1 + 2 + 1 + 46 + 612 + 3 + 1 = 666.

It is not a de Polignac number, because 1214661231 - 2³ = 1214661223 is a prime.

It is a super-2 number, since 2×1214661231² = 2950803812188870722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1214661195 and 1214661204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214661031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19285 + ... + 52926.

It is an arithmetic number, because the mean of its divisors is an integer number (64990800).

Almost surely, 2^1214661231 is an apocalyptic number.

1214661231 is a deficient number, since it is larger than the sum of its proper divisors (865044369).

1214661231 is an equidigital number, since it uses as much as digits as its factorization.

1214661231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72316 (or 72310 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1214661231 is about 34851.9903448856. The cubic root of 1214661231 is about 1066.9688080387.

The spelling of 1214661231 in words is "one billion, two hundred fourteen million, six hundred sixty-one thousand, two hundred thirty-one".