1231136214 has 64 divisors (see below), whose sum is σ = 3078950400. Its totient is φ = 318827520.

The previous prime is 1231136213. The next prime is 1231136219. The reversal of 1231136214 is 4126311321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231136213) 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, 159312 + ... + 166860.

It is an arithmetic number, because the mean of its divisors is an integer number (48108600).

Almost surely, 2^1231136214 is an apocalyptic number.

1231136214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231136214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1539475200).

1231136214 is an abundant number, since it is smaller than the sum of its proper divisors (1847814186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231136214 is a wasteful number, since it uses less digits than its factorization.

1231136214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7925.

The product of its digits is 864, while the sum is 24.

The square root of 1231136214 is about 35087.5506982177. The cubic root of 1231136214 is about 1071.7710832162.

Adding to 1231136214 its reverse (4126311321), we get a palindrome (5357447535).

The spelling of 1231136214 in words is "one billion, two hundred thirty-one million, one hundred thirty-six thousand, two hundred fourteen".