2313121340 has 24 divisors (see below), whose sum is σ = 4858465920. Its totient is φ = 925075008.

The previous prime is 2313121319. The next prime is 2313121357. The reversal of 2313121340 is 431213132.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182654 + ... + 194906.

It is an arithmetic number, because the mean of its divisors is an integer number (202436080).

Almost surely, 2^2313121340 is an apocalyptic number.

2313121340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2313121340 is an abundant number, since it is smaller than the sum of its proper divisors (2545344580).

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

2313121340 is a wasteful number, since it uses less digits than its factorization.

2313121340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21701 (or 21699 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2313121340 is about 48094.9201059738. The cubic root of 2313121340 is about 1322.5115444311.

Adding to 2313121340 its reverse (431213132), we get a palindrome (2744334472).

The spelling of 2313121340 in words is "two billion, three hundred thirteen million, one hundred twenty-one thousand, three hundred forty".