1231513350 has 48 divisors (see below), whose sum is σ = 3064089600. Its totient is φ = 327335200.

The previous prime is 1231513331. The next prime is 1231513369. The reversal of 1231513350 is 533151321.

It is an interprime number because it is at equal distance from previous prime (1231513331) and next prime (1231513369).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231513350.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33451 + ... + 59849.

It is an arithmetic number, because the mean of its divisors is an integer number (63835200).

Almost surely, 2^1231513350 is an apocalyptic number.

1231513350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231513350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1532044800).

1231513350 is an abundant number, since it is smaller than the sum of its proper divisors (1832576250).

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

1231513350 is a wasteful number, since it uses less digits than its factorization.

1231513350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26725 (or 26720 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 1231513350 is about 35092.9245005314. The cubic root of 1231513350 is about 1071.8805111816.

Adding to 1231513350 its reverse (533151321), we get a palindrome (1764664671).

The spelling of 1231513350 in words is "one billion, two hundred thirty-one million, five hundred thirteen thousand, three hundred fifty".